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Finding the Fourth Proportional to 1,436.59, 2,154.95 and 742.52

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Solution

The fourth proportional to 1,436.59, 2,154.95 and 742.52 is: 1,113.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,436.59 : 2,154.95 = 742.52 : x
  2. Step 2: Convert to fraction form
    1,436.59/2,154.95 = 742.52/x
  3. Step 3: Cross multiply
    1,436.59x = 2,154.95 × 742.52
  4. Step 4: Simplify right side
    1,436.59x = 1,600,089.99
  5. Step 5: Solve for x
    x = 1,600,089.99/1,436.59
  6. Step 6: Final answer
    x = 1,113.81

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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.