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Finding the Fourth Proportional to 661,287.16, 912,585.36 and 359,487.64

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Solution

The fourth proportional to 661,287.16, 912,585.36 and 359,487.64 is: 496,097.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,287.16 : 912,585.36 = 359,487.64 : x
  2. Step 2: Convert to fraction form
    661,287.16/912,585.36 = 359,487.64/x
  3. Step 3: Cross multiply
    661,287.16x = 912,585.36 × 359,487.64
  4. Step 4: Simplify right side
    661,287.16x = 328,063,157,364.95
  5. Step 5: Solve for x
    x = 328,063,157,364.95/661,287.16
  6. Step 6: Final answer
    x = 496,097.88

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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.