Home / 1,087.47-1,631.21-357.11

Finding the Fourth Proportional to 1,087.47, 1,631.21 and 357.11

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Solution

The fourth proportional to 1,087.47, 1,631.21 and 357.11 is: 535.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,087.47 : 1,631.21 = 357.11 : x
  2. Step 2: Convert to fraction form
    1,087.47/1,631.21 = 357.11/x
  3. Step 3: Cross multiply
    1,087.47x = 1,631.21 × 357.11
  4. Step 4: Simplify right side
    1,087.47x = 582,511.46
  5. Step 5: Solve for x
    x = 582,511.46/1,087.47
  6. Step 6: Final answer
    x = 535.66

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Double scale
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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.