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Finding the Fourth Proportional to 882.68, 1,324.08 and 420.68

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Solution

The fourth proportional to 882.68, 1,324.08 and 420.68 is: 631.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    882.68 : 1,324.08 = 420.68 : x
  2. Step 2: Convert to fraction form
    882.68/1,324.08 = 420.68/x
  3. Step 3: Cross multiply
    882.68x = 1,324.08 × 420.68
  4. Step 4: Simplify right side
    882.68x = 557,007.35
  5. Step 5: Solve for x
    x = 557,007.35/882.68
  6. Step 6: Final answer
    x = 631.04

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1.5x scale

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.