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Finding the Fourth Proportional to 534.58, 737.80 and 387.70

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Solution

The fourth proportional to 534.58, 737.80 and 387.70 is: 535.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    534.58 : 737.80 = 387.70 : x
  2. Step 2: Convert to fraction form
    534.58/737.80 = 387.70/x
  3. Step 3: Cross multiply
    534.58x = 737.80 × 387.70
  4. Step 4: Simplify right side
    534.58x = 286,045.06
  5. Step 5: Solve for x
    x = 286,045.06/534.58
  6. Step 6: Final answer
    x = 535.08

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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.