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Finding the Fourth Proportional to 870,763.68, 1,306,650 and 365,280

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Solution

The fourth proportional to 870,763.68, 1,306,650 and 365,280 is: 548,131.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,763.68 : 1,306,650 = 365,280 : x
  2. Step 2: Convert to fraction form
    870,763.68/1,306,650 = 365,280/x
  3. Step 3: Cross multiply
    870,763.68x = 1,306,650 × 365,280
  4. Step 4: Simplify right side
    870,763.68x = 477,293,112,000
  5. Step 5: Solve for x
    x = 477,293,112,000/870,763.68
  6. Step 6: Final answer
    x = 548,131.63

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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.