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Finding the Fourth Proportional to 631.01, 869.92 and 483.39

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Solution

The fourth proportional to 631.01, 869.92 and 483.39 is: 666.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.01 : 869.92 = 483.39 : x
  2. Step 2: Convert to fraction form
    631.01/869.92 = 483.39/x
  3. Step 3: Cross multiply
    631.01x = 869.92 × 483.39
  4. Step 4: Simplify right side
    631.01x = 420,509.42
  5. Step 5: Solve for x
    x = 420,509.42/631.01
  6. Step 6: Final answer
    x = 666.40

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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.