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Finding the Fourth Proportional to 1,050.88, 1,450.11 and 631.12

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Solution

The fourth proportional to 1,050.88, 1,450.11 and 631.12 is: 870.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,050.88 : 1,450.11 = 631.12 : x
  2. Step 2: Convert to fraction form
    1,050.88/1,450.11 = 631.12/x
  3. Step 3: Cross multiply
    1,050.88x = 1,450.11 × 631.12
  4. Step 4: Simplify right side
    1,050.88x = 915,193.42
  5. Step 5: Solve for x
    x = 915,193.42/1,050.88
  6. Step 6: Final answer
    x = 870.88

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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.