Home / 1,050.23-1,572.30-639.15

Finding the Fourth Proportional to 1,050.23, 1,572.30 and 639.15

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Solution

The fourth proportional to 1,050.23, 1,572.30 and 639.15 is: 956.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,050.23 : 1,572.30 = 639.15 : x
  2. Step 2: Convert to fraction form
    1,050.23/1,572.30 = 639.15/x
  3. Step 3: Cross multiply
    1,050.23x = 1,572.30 × 639.15
  4. Step 4: Simplify right side
    1,050.23x = 1,004,935.55
  5. Step 5: Solve for x
    x = 1,004,935.55/1,050.23
  6. Step 6: Final answer
    x = 956.87

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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.