Home / 1,118.12-1,677.21-424.70

Finding the Fourth Proportional to 1,118.12, 1,677.21 and 424.70

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Solution

The fourth proportional to 1,118.12, 1,677.21 and 424.70 is: 637.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,118.12 : 1,677.21 = 424.70 : x
  2. Step 2: Convert to fraction form
    1,118.12/1,677.21 = 424.70/x
  3. Step 3: Cross multiply
    1,118.12x = 1,677.21 × 424.70
  4. Step 4: Simplify right side
    1,118.12x = 712,311.09
  5. Step 5: Solve for x
    x = 712,311.09/1,118.12
  6. Step 6: Final answer
    x = 637.06

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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.