Home / 1,116.13-1,674.95-385.70

Finding the Fourth Proportional to 1,116.13, 1,674.95 and 385.70

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Solution

The fourth proportional to 1,116.13, 1,674.95 and 385.70 is: 578.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,116.13 : 1,674.95 = 385.70 : x
  2. Step 2: Convert to fraction form
    1,116.13/1,674.95 = 385.70/x
  3. Step 3: Cross multiply
    1,116.13x = 1,674.95 × 385.70
  4. Step 4: Simplify right side
    1,116.13x = 646,028.23
  5. Step 5: Solve for x
    x = 646,028.23/1,116.13
  6. Step 6: Final answer
    x = 578.81

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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.