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Finding the Fourth Proportional to 516,520.76, 712,749.68 and 478,434.16

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Solution

The fourth proportional to 516,520.76, 712,749.68 and 478,434.16 is: 660,193.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    516,520.76 : 712,749.68 = 478,434.16 : x
  2. Step 2: Convert to fraction form
    516,520.76/712,749.68 = 478,434.16/x
  3. Step 3: Cross multiply
    516,520.76x = 712,749.68 × 478,434.16
  4. Step 4: Simplify right side
    516,520.76x = 341,003,794,441.07
  5. Step 5: Solve for x
    x = 341,003,794,441.07/516,520.76
  6. Step 6: Final answer
    x = 660,193.78

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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.