Home / 1,117.45-1,542.11-620.13

Finding the Fourth Proportional to 1,117.45, 1,542.11 and 620.13

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Solution

The fourth proportional to 1,117.45, 1,542.11 and 620.13 is: 855.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,117.45 : 1,542.11 = 620.13 : x
  2. Step 2: Convert to fraction form
    1,117.45/1,542.11 = 620.13/x
  3. Step 3: Cross multiply
    1,117.45x = 1,542.11 × 620.13
  4. Step 4: Simplify right side
    1,117.45x = 956,308.67
  5. Step 5: Solve for x
    x = 956,308.67/1,117.45
  6. Step 6: Final answer
    x = 855.80

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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.