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Finding the Fourth Proportional to 1,432.55, 2,148.80 and 738.99

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Solution

The fourth proportional to 1,432.55, 2,148.80 and 738.99 is: 1,108.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,432.55 : 2,148.80 = 738.99 : x
  2. Step 2: Convert to fraction form
    1,432.55/2,148.80 = 738.99/x
  3. Step 3: Cross multiply
    1,432.55x = 2,148.80 × 738.99
  4. Step 4: Simplify right side
    1,432.55x = 1,587,938.02
  5. Step 5: Solve for x
    x = 1,587,938.02/1,432.55
  6. Step 6: Final answer
    x = 1,108.47

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1.5x scale

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.