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Finding the Fourth Proportional to 1,251.99, 1,875.91 and 429.81

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Solution

The fourth proportional to 1,251.99, 1,875.91 and 429.81 is: 644.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,251.99 : 1,875.91 = 429.81 : x
  2. Step 2: Convert to fraction form
    1,251.99/1,875.91 = 429.81/x
  3. Step 3: Cross multiply
    1,251.99x = 1,875.91 × 429.81
  4. Step 4: Simplify right side
    1,251.99x = 806,284.88
  5. Step 5: Solve for x
    x = 806,284.88/1,251.99
  6. Step 6: Final answer
    x = 644.00

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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.