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Finding the Fourth Proportional to 1,087.49, 1,631.24 and 307.49

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Solution

The fourth proportional to 1,087.49, 1,631.24 and 307.49 is: 461.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,087.49 : 1,631.24 = 307.49 : x
  2. Step 2: Convert to fraction form
    1,087.49/1,631.24 = 307.49/x
  3. Step 3: Cross multiply
    1,087.49x = 1,631.24 × 307.49
  4. Step 4: Simplify right side
    1,087.49x = 501,580.29
  5. Step 5: Solve for x
    x = 501,580.29/1,087.49
  6. Step 6: Final answer
    x = 461.23

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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.