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Finding the Fourth Proportional to 1,624.75, 2,436.80 and 747.02

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Solution

The fourth proportional to 1,624.75, 2,436.80 and 747.02 is: 1,120.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,624.75 : 2,436.80 = 747.02 : x
  2. Step 2: Convert to fraction form
    1,624.75/2,436.80 = 747.02/x
  3. Step 3: Cross multiply
    1,624.75x = 2,436.80 × 747.02
  4. Step 4: Simplify right side
    1,624.75x = 1,820,338.34
  5. Step 5: Solve for x
    x = 1,820,338.34/1,624.75
  6. Step 6: Final answer
    x = 1,120.38

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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.