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Finding the Fourth Proportional to 661,144.16, 912,384.96 and 359,338.88

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Solution

The fourth proportional to 661,144.16, 912,384.96 and 359,338.88 is: 495,890.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,144.16 : 912,384.96 = 359,338.88 : x
  2. Step 2: Convert to fraction form
    661,144.16/912,384.96 = 359,338.88/x
  3. Step 3: Cross multiply
    661,144.16x = 912,384.96 × 359,338.88
  4. Step 4: Simplify right side
    661,144.16x = 327,855,389,655.25
  5. Step 5: Solve for x
    x = 327,855,389,655.25/661,144.16
  6. Step 6: Final answer
    x = 495,890.93

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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.