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Finding the Fourth Proportional to 1,050.84, 1,449.99 and 631.13

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Solution

The fourth proportional to 1,050.84, 1,449.99 and 631.13 is: 870.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,050.84 : 1,449.99 = 631.13 : x
  2. Step 2: Convert to fraction form
    1,050.84/1,449.99 = 631.13/x
  3. Step 3: Cross multiply
    1,050.84x = 1,449.99 × 631.13
  4. Step 4: Simplify right side
    1,050.84x = 915,124.94
  5. Step 5: Solve for x
    x = 915,124.94/1,050.84
  6. Step 6: Final answer
    x = 870.85

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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.