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Finding the Fourth Proportional to 485,115.40, 727,802.70 and 432,886.60

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Solution

The fourth proportional to 485,115.40, 727,802.70 and 432,886.60 is: 649,445.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,115.40 : 727,802.70 = 432,886.60 : x
  2. Step 2: Convert to fraction form
    485,115.40/727,802.70 = 432,886.60/x
  3. Step 3: Cross multiply
    485,115.40x = 727,802.70 × 432,886.60
  4. Step 4: Simplify right side
    485,115.40x = 315,056,036,273.82
  5. Step 5: Solve for x
    x = 315,056,036,273.82/485,115.40
  6. Step 6: Final answer
    x = 649,445.55

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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.