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Finding the Fourth Proportional to 630.91, 869.88 and 483.31

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Solution

The fourth proportional to 630.91, 869.88 and 483.31 is: 666.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.91 : 869.88 = 483.31 : x
  2. Step 2: Convert to fraction form
    630.91/869.88 = 483.31/x
  3. Step 3: Cross multiply
    630.91x = 869.88 × 483.31
  4. Step 4: Simplify right side
    630.91x = 420,421.70
  5. Step 5: Solve for x
    x = 420,421.70/630.91
  6. Step 6: Final answer
    x = 666.37

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1.5x scale

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.