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Finding the Fourth Proportional to 657.08, 987 and 559.58

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Solution

The fourth proportional to 657.08, 987 and 559.58 is: 840.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    657.08 : 987 = 559.58 : x
  2. Step 2: Convert to fraction form
    657.08/987 = 559.58/x
  3. Step 3: Cross multiply
    657.08x = 987 × 559.58
  4. Step 4: Simplify right side
    657.08x = 552,305.46
  5. Step 5: Solve for x
    x = 552,305.46/657.08
  6. Step 6: Final answer
    x = 840.55

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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.