Home / 1,117.48-1,542.13-620.12

Finding the Fourth Proportional to 1,117.48, 1,542.13 and 620.12

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Solution

The fourth proportional to 1,117.48, 1,542.13 and 620.12 is: 855.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,117.48 : 1,542.13 = 620.12 : x
  2. Step 2: Convert to fraction form
    1,117.48/1,542.13 = 620.12/x
  3. Step 3: Cross multiply
    1,117.48x = 1,542.13 × 620.12
  4. Step 4: Simplify right side
    1,117.48x = 956,305.66
  5. Step 5: Solve for x
    x = 956,305.66/1,117.48
  6. Step 6: Final answer
    x = 855.77

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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.