Home / 1,291.13-1,937.00-458.15

Finding the Fourth Proportional to 1,291.13, 1,937.00 and 458.15

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Solution

The fourth proportional to 1,291.13, 1,937.00 and 458.15 is: 687.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,291.13 : 1,937.00 = 458.15 : x
  2. Step 2: Convert to fraction form
    1,291.13/1,937.00 = 458.15/x
  3. Step 3: Cross multiply
    1,291.13x = 1,937.00 × 458.15
  4. Step 4: Simplify right side
    1,291.13x = 887,431.84
  5. Step 5: Solve for x
    x = 887,431.84/1,291.13
  6. Step 6: Final answer
    x = 687.33

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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.