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Finding the Fourth Proportional to 631.34, 865.69 and 568.92

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Solution

The fourth proportional to 631.34, 865.69 and 568.92 is: 780.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.34 : 865.69 = 568.92 : x
  2. Step 2: Convert to fraction form
    631.34/865.69 = 568.92/x
  3. Step 3: Cross multiply
    631.34x = 865.69 × 568.92
  4. Step 4: Simplify right side
    631.34x = 492,510.18
  5. Step 5: Solve for x
    x = 492,510.18/631.34
  6. Step 6: Final answer
    x = 780.10

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.