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Finding the Fourth Proportional to 922.34, 1,272.80 and 502.68

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Solution

The fourth proportional to 922.34, 1,272.80 and 502.68 is: 693.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    922.34 : 1,272.80 = 502.68 : x
  2. Step 2: Convert to fraction form
    922.34/1,272.80 = 502.68/x
  3. Step 3: Cross multiply
    922.34x = 1,272.80 × 502.68
  4. Step 4: Simplify right side
    922.34x = 639,811.10
  5. Step 5: Solve for x
    x = 639,811.10/922.34
  6. Step 6: Final answer
    x = 693.68

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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.