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Finding the Fourth Proportional to 1,219.52, 1,678.80 and 924.32

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Solution

The fourth proportional to 1,219.52, 1,678.80 and 924.32 is: 1,272.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,219.52 : 1,678.80 = 924.32 : x
  2. Step 2: Convert to fraction form
    1,219.52/1,678.80 = 924.32/x
  3. Step 3: Cross multiply
    1,219.52x = 1,678.80 × 924.32
  4. Step 4: Simplify right side
    1,219.52x = 1,551,748.42
  5. Step 5: Solve for x
    x = 1,551,748.42/1,219.52
  6. Step 6: Final answer
    x = 1,272.43

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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.