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Finding the Fourth Proportional to 922.32, 1,272.80 and 508.32

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Solution

The fourth proportional to 922.32, 1,272.80 and 508.32 is: 701.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    922.32 : 1,272.80 = 508.32 : x
  2. Step 2: Convert to fraction form
    922.32/1,272.80 = 508.32/x
  3. Step 3: Cross multiply
    922.32x = 1,272.80 × 508.32
  4. Step 4: Simplify right side
    922.32x = 646,989.70
  5. Step 5: Solve for x
    x = 646,989.70/922.32
  6. Step 6: Final answer
    x = 701.48

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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.