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Finding the Fourth Proportional to 872,216.76, 1,203,755.10 and 499,715.16

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Solution

The fourth proportional to 872,216.76, 1,203,755.10 and 499,715.16 is: 689,661.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    872,216.76 : 1,203,755.10 = 499,715.16 : x
  2. Step 2: Convert to fraction form
    872,216.76/1,203,755.10 = 499,715.16/x
  3. Step 3: Cross multiply
    872,216.76x = 1,203,755.10 × 499,715.16
  4. Step 4: Simplify right side
    872,216.76x = 601,534,672,397.32
  5. Step 5: Solve for x
    x = 601,534,672,397.32/872,216.76
  6. Step 6: Final answer
    x = 689,661.91

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.