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Finding the Fourth Proportional to 485,309.10, 727,963.65 and 401,328.30

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Solution

The fourth proportional to 485,309.10, 727,963.65 and 401,328.30 is: 601,992.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,309.10 : 727,963.65 = 401,328.30 : x
  2. Step 2: Convert to fraction form
    485,309.10/727,963.65 = 401,328.30/x
  3. Step 3: Cross multiply
    485,309.10x = 727,963.65 × 401,328.30
  4. Step 4: Simplify right side
    485,309.10x = 292,152,414,116.30
  5. Step 5: Solve for x
    x = 292,152,414,116.30/485,309.10
  6. Step 6: Final answer
    x = 601,992.45

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Similar ratio
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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.