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Finding the Fourth Proportional to 586.52, 809.28 and 389.90

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Solution

The fourth proportional to 586.52, 809.28 and 389.90 is: 537.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    586.52 : 809.28 = 389.90 : x
  2. Step 2: Convert to fraction form
    586.52/809.28 = 389.90/x
  3. Step 3: Cross multiply
    586.52x = 809.28 × 389.90
  4. Step 4: Simplify right side
    586.52x = 315,538.27
  5. Step 5: Solve for x
    x = 315,538.27/586.52
  6. Step 6: Final answer
    x = 537.98

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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.