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Finding the Fourth Proportional to 630.27, 870.21 and 482.65

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Solution

The fourth proportional to 630.27, 870.21 and 482.65 is: 666.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.27 : 870.21 = 482.65 : x
  2. Step 2: Convert to fraction form
    630.27/870.21 = 482.65/x
  3. Step 3: Cross multiply
    630.27x = 870.21 × 482.65
  4. Step 4: Simplify right side
    630.27x = 420,006.86
  5. Step 5: Solve for x
    x = 420,006.86/630.27
  6. Step 6: Final answer
    x = 666.39

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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.