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Finding the Fourth Proportional to 839.32, 1,158.38 and 524.91

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Solution

The fourth proportional to 839.32, 1,158.38 and 524.91 is: 724.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    839.32 : 1,158.38 = 524.91 : x
  2. Step 2: Convert to fraction form
    839.32/1,158.38 = 524.91/x
  3. Step 3: Cross multiply
    839.32x = 1,158.38 × 524.91
  4. Step 4: Simplify right side
    839.32x = 608,045.25
  5. Step 5: Solve for x
    x = 608,045.25/839.32
  6. Step 6: Final answer
    x = 724.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.