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Finding the Fourth Proportional to 804,640.20, 1,207,881.90 and 472,403.40

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Solution

The fourth proportional to 804,640.20, 1,207,881.90 and 472,403.40 is: 709,146.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    804,640.20 : 1,207,881.90 = 472,403.40 : x
  2. Step 2: Convert to fraction form
    804,640.20/1,207,881.90 = 472,403.40/x
  3. Step 3: Cross multiply
    804,640.20x = 1,207,881.90 × 472,403.40
  4. Step 4: Simplify right side
    804,640.20x = 570,607,516,358.46
  5. Step 5: Solve for x
    x = 570,607,516,358.46/804,640.20
  6. Step 6: Final answer
    x = 709,146.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.