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Finding the Fourth Proportional to 520,610.70, 781,638.78 and 268,071.66

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Solution

The fourth proportional to 520,610.70, 781,638.78 and 268,071.66 is: 402,479.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,610.70 : 781,638.78 = 268,071.66 : x
  2. Step 2: Convert to fraction form
    520,610.70/781,638.78 = 268,071.66/x
  3. Step 3: Cross multiply
    520,610.70x = 781,638.78 × 268,071.66
  4. Step 4: Simplify right side
    520,610.70x = 209,535,205,274.98
  5. Step 5: Solve for x
    x = 209,535,205,274.98/520,610.70
  6. Step 6: Final answer
    x = 402,479.64

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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.