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Finding the Fourth Proportional to 1,587.75, 2,381.63 and 433.50

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Solution

The fourth proportional to 1,587.75, 2,381.63 and 433.50 is: 650.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,587.75 : 2,381.63 = 433.50 : x
  2. Step 2: Convert to fraction form
    1,587.75/2,381.63 = 433.50/x
  3. Step 3: Cross multiply
    1,587.75x = 2,381.63 × 433.50
  4. Step 4: Simplify right side
    1,587.75x = 1,032,434.44
  5. Step 5: Solve for x
    x = 1,032,434.44/1,587.75
  6. Step 6: Final answer
    x = 650.25

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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.