Home / 1,116.10-1,674.11-385.66

Finding the Fourth Proportional to 1,116.10, 1,674.11 and 385.66

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Solution

The fourth proportional to 1,116.10, 1,674.11 and 385.66 is: 578.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,116.10 : 1,674.11 = 385.66 : x
  2. Step 2: Convert to fraction form
    1,116.10/1,674.11 = 385.66/x
  3. Step 3: Cross multiply
    1,116.10x = 1,674.11 × 385.66
  4. Step 4: Simplify right side
    1,116.10x = 645,637.26
  5. Step 5: Solve for x
    x = 645,637.26/1,116.10
  6. Step 6: Final answer
    x = 578.48

Related Problems

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Half scale
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Double scale
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Similar ratio
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1.5x scale

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.