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Finding the Fourth Proportional to 630.39, 947.61 and 585.30

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Solution

The fourth proportional to 630.39, 947.61 and 585.30 is: 879.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.39 : 947.61 = 585.30 : x
  2. Step 2: Convert to fraction form
    630.39/947.61 = 585.30/x
  3. Step 3: Cross multiply
    630.39x = 947.61 × 585.30
  4. Step 4: Simplify right side
    630.39x = 554,636.13
  5. Step 5: Solve for x
    x = 554,636.13/630.39
  6. Step 6: Final answer
    x = 879.83

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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.