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Finding the Fourth Proportional to 1,526.68, 2,290.68 and 649.78

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Solution

The fourth proportional to 1,526.68, 2,290.68 and 649.78 is: 974.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,526.68 : 2,290.68 = 649.78 : x
  2. Step 2: Convert to fraction form
    1,526.68/2,290.68 = 649.78/x
  3. Step 3: Cross multiply
    1,526.68x = 2,290.68 × 649.78
  4. Step 4: Simplify right side
    1,526.68x = 1,488,432.32
  5. Step 5: Solve for x
    x = 1,488,432.32/1,526.68
  6. Step 6: Final answer
    x = 974.95

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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.