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Finding the Fourth Proportional to 1,118.97, 1,677.69 and 570.39

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Solution

The fourth proportional to 1,118.97, 1,677.69 and 570.39 is: 855.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,118.97 : 1,677.69 = 570.39 : x
  2. Step 2: Convert to fraction form
    1,118.97/1,677.69 = 570.39/x
  3. Step 3: Cross multiply
    1,118.97x = 1,677.69 × 570.39
  4. Step 4: Simplify right side
    1,118.97x = 956,937.60
  5. Step 5: Solve for x
    x = 956,937.60/1,118.97
  6. Step 6: Final answer
    x = 855.20

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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.