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Finding the Fourth Proportional to 1,050.67, 1,449.90 and 657.91

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Solution

The fourth proportional to 1,050.67, 1,449.90 and 657.91 is: 907.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,050.67 : 1,449.90 = 657.91 : x
  2. Step 2: Convert to fraction form
    1,050.67/1,449.90 = 657.91/x
  3. Step 3: Cross multiply
    1,050.67x = 1,449.90 × 657.91
  4. Step 4: Simplify right side
    1,050.67x = 953,900.08
  5. Step 5: Solve for x
    x = 953,900.08/1,050.67
  6. Step 6: Final answer
    x = 907.90

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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.