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Finding the Fourth Proportional to 619.71, 928.17 and 558.87

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Solution

The fourth proportional to 619.71, 928.17 and 558.87 is: 837.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.71 : 928.17 = 558.87 : x
  2. Step 2: Convert to fraction form
    619.71/928.17 = 558.87/x
  3. Step 3: Cross multiply
    619.71x = 928.17 × 558.87
  4. Step 4: Simplify right side
    619.71x = 518,726.37
  5. Step 5: Solve for x
    x = 518,726.37/619.71
  6. Step 6: Final answer
    x = 837.05

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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.