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Finding the Fourth Proportional to 1,111.19, 1,665.87 and 555.53

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Solution

The fourth proportional to 1,111.19, 1,665.87 and 555.53 is: 832.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,111.19 : 1,665.87 = 555.53 : x
  2. Step 2: Convert to fraction form
    1,111.19/1,665.87 = 555.53/x
  3. Step 3: Cross multiply
    1,111.19x = 1,665.87 × 555.53
  4. Step 4: Simplify right side
    1,111.19x = 925,432.43
  5. Step 5: Solve for x
    x = 925,432.43/1,111.19
  6. Step 6: Final answer
    x = 832.83

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.