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Finding the Fourth Proportional to 521,903.48, 781,526.22 and 343,870.74

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Solution

The fourth proportional to 521,903.48, 781,526.22 and 343,870.74 is: 514,930.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,903.48 : 781,526.22 = 343,870.74 : x
  2. Step 2: Convert to fraction form
    521,903.48/781,526.22 = 343,870.74/x
  3. Step 3: Cross multiply
    521,903.48x = 781,526.22 × 343,870.74
  4. Step 4: Simplify right side
    521,903.48x = 268,743,999,600.80
  5. Step 5: Solve for x
    x = 268,743,999,600.80/521,903.48
  6. Step 6: Final answer
    x = 514,930.47

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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.