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Finding the Fourth Proportional to 631.80, 947.88 and 585.36

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Solution

The fourth proportional to 631.80, 947.88 and 585.36 is: 878.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.80 : 947.88 = 585.36 : x
  2. Step 2: Convert to fraction form
    631.80/947.88 = 585.36/x
  3. Step 3: Cross multiply
    631.80x = 947.88 × 585.36
  4. Step 4: Simplify right side
    631.80x = 554,851.04
  5. Step 5: Solve for x
    x = 554,851.04/631.80
  6. Step 6: Final answer
    x = 878.21

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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.