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Finding the Fourth Proportional to 757.86, 1,045.54 and 438.62

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Solution

The fourth proportional to 757.86, 1,045.54 and 438.62 is: 605.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    757.86 : 1,045.54 = 438.62 : x
  2. Step 2: Convert to fraction form
    757.86/1,045.54 = 438.62/x
  3. Step 3: Cross multiply
    757.86x = 1,045.54 × 438.62
  4. Step 4: Simplify right side
    757.86x = 458,594.00
  5. Step 5: Solve for x
    x = 458,594.00/757.86
  6. Step 6: Final answer
    x = 605.12

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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.