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Finding the Fourth Proportional to 663,470.72, 915,588.20 and 373,083.28

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Solution

The fourth proportional to 663,470.72, 915,588.20 and 373,083.28 is: 514,854.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,470.72 : 915,588.20 = 373,083.28 : x
  2. Step 2: Convert to fraction form
    663,470.72/915,588.20 = 373,083.28/x
  3. Step 3: Cross multiply
    663,470.72x = 915,588.20 × 373,083.28
  4. Step 4: Simplify right side
    663,470.72x = 341,590,648,785.30
  5. Step 5: Solve for x
    x = 341,590,648,785.30/663,470.72
  6. Step 6: Final answer
    x = 514,854.14

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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.