Home / 1,045.24-1,442.20-631.48

Finding the Fourth Proportional to 1,045.24, 1,442.20 and 631.48

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Solution

The fourth proportional to 1,045.24, 1,442.20 and 631.48 is: 871.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,045.24 : 1,442.20 = 631.48 : x
  2. Step 2: Convert to fraction form
    1,045.24/1,442.20 = 631.48/x
  3. Step 3: Cross multiply
    1,045.24x = 1,442.20 × 631.48
  4. Step 4: Simplify right side
    1,045.24x = 910,720.46
  5. Step 5: Solve for x
    x = 910,720.46/1,045.24
  6. Step 6: Final answer
    x = 871.30

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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.