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Finding the Fourth Proportional to 485,117.40, 727,805.70 and 432,888.60

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Solution

The fourth proportional to 485,117.40, 727,805.70 and 432,888.60 is: 649,448.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,117.40 : 727,805.70 = 432,888.60 : x
  2. Step 2: Convert to fraction form
    485,117.40/727,805.70 = 432,888.60/x
  3. Step 3: Cross multiply
    485,117.40x = 727,805.70 × 432,888.60
  4. Step 4: Simplify right side
    485,117.40x = 315,058,790,545.02
  5. Step 5: Solve for x
    x = 315,058,790,545.02/485,117.40
  6. Step 6: Final answer
    x = 649,448.55

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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.