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Finding the Fourth Proportional to 870,128.60, 1,304,804.10 and 337,472.60

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Solution

The fourth proportional to 870,128.60, 1,304,804.10 and 337,472.60 is: 506,058.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,128.60 : 1,304,804.10 = 337,472.60 : x
  2. Step 2: Convert to fraction form
    870,128.60/1,304,804.10 = 337,472.60/x
  3. Step 3: Cross multiply
    870,128.60x = 1,304,804.10 × 337,472.60
  4. Step 4: Simplify right side
    870,128.60x = 440,335,632,117.66
  5. Step 5: Solve for x
    x = 440,335,632,117.66/870,128.60
  6. Step 6: Final answer
    x = 506,058.11

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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.