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Finding the Fourth Proportional to 485,144.64, 728,534.88 and 316,952.64

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Solution

The fourth proportional to 485,144.64, 728,534.88 and 316,952.64 is: 475,963.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,144.64 : 728,534.88 = 316,952.64 : x
  2. Step 2: Convert to fraction form
    485,144.64/728,534.88 = 316,952.64/x
  3. Step 3: Cross multiply
    485,144.64x = 728,534.88 × 316,952.64
  4. Step 4: Simplify right side
    485,144.64x = 230,911,053,548.08
  5. Step 5: Solve for x
    x = 230,911,053,548.08/485,144.64
  6. Step 6: Final answer
    x = 475,963.32

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1.5x scale

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.