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Finding the Fourth Proportional to 630.60, 870.39 and 564.99

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Solution

The fourth proportional to 630.60, 870.39 and 564.99 is: 779.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.60 : 870.39 = 564.99 : x
  2. Step 2: Convert to fraction form
    630.60/870.39 = 564.99/x
  3. Step 3: Cross multiply
    630.60x = 870.39 × 564.99
  4. Step 4: Simplify right side
    630.60x = 491,761.65
  5. Step 5: Solve for x
    x = 491,761.65/630.60
  6. Step 6: Final answer
    x = 779.83

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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.