Home / 1,117.23-1,541.68-644.91

Finding the Fourth Proportional to 1,117.23, 1,541.68 and 644.91

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Solution

The fourth proportional to 1,117.23, 1,541.68 and 644.91 is: 889.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,117.23 : 1,541.68 = 644.91 : x
  2. Step 2: Convert to fraction form
    1,117.23/1,541.68 = 644.91/x
  3. Step 3: Cross multiply
    1,117.23x = 1,541.68 × 644.91
  4. Step 4: Simplify right side
    1,117.23x = 994,244.85
  5. Step 5: Solve for x
    x = 994,244.85/1,117.23
  6. Step 6: Final answer
    x = 889.92

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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.