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Finding the Fourth Proportional to 661,061.92, 912,275.28 and 359,256.16

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Solution

The fourth proportional to 661,061.92, 912,275.28 and 359,256.16 is: 495,778.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,061.92 : 912,275.28 = 359,256.16 : x
  2. Step 2: Convert to fraction form
    661,061.92/912,275.28 = 359,256.16/x
  3. Step 3: Cross multiply
    661,061.92x = 912,275.28 × 359,256.16
  4. Step 4: Simplify right side
    661,061.92x = 327,740,513,955.73
  5. Step 5: Solve for x
    x = 327,740,513,955.73/661,061.92
  6. Step 6: Final answer
    x = 495,778.84

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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.