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Finding the Fourth Proportional to 1,119.23, 1,677.72 and 425.72

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Solution

The fourth proportional to 1,119.23, 1,677.72 and 425.72 is: 638.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,119.23 : 1,677.72 = 425.72 : x
  2. Step 2: Convert to fraction form
    1,119.23/1,677.72 = 425.72/x
  3. Step 3: Cross multiply
    1,119.23x = 1,677.72 × 425.72
  4. Step 4: Simplify right side
    1,119.23x = 714,238.96
  5. Step 5: Solve for x
    x = 714,238.96/1,119.23
  6. Step 6: Final answer
    x = 638.15

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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.