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Finding the Fourth Proportional to 661,124.48, 912,407.11 and 370,731.42

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Solution

The fourth proportional to 661,124.48, 912,407.11 and 370,731.42 is: 511,640.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,124.48 : 912,407.11 = 370,731.42 : x
  2. Step 2: Convert to fraction form
    661,124.48/912,407.11 = 370,731.42/x
  3. Step 3: Cross multiply
    661,124.48x = 912,407.11 × 370,731.42
  4. Step 4: Simplify right side
    661,124.48x = 338,257,982,581.57
  5. Step 5: Solve for x
    x = 338,257,982,581.57/661,124.48
  6. Step 6: Final answer
    x = 511,640.39

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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.