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Finding the Fourth Proportional to 723,437.19, 998,139.71 and 569,999.70

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Solution

The fourth proportional to 723,437.19, 998,139.71 and 569,999.70 is: 786,439.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    723,437.19 : 998,139.71 = 569,999.70 : x
  2. Step 2: Convert to fraction form
    723,437.19/998,139.71 = 569,999.70/x
  3. Step 3: Cross multiply
    723,437.19x = 998,139.71 × 569,999.70
  4. Step 4: Simplify right side
    723,437.19x = 568,939,336,683.09
  5. Step 5: Solve for x
    x = 568,939,336,683.09/723,437.19
  6. Step 6: Final answer
    x = 786,439.16

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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.