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Finding the Fourth Proportional to 1,587.91, 2,381.83 and 433.66

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Solution

The fourth proportional to 1,587.91, 2,381.83 and 433.66 is: 650.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,587.91 : 2,381.83 = 433.66 : x
  2. Step 2: Convert to fraction form
    1,587.91/2,381.83 = 433.66/x
  3. Step 3: Cross multiply
    1,587.91x = 2,381.83 × 433.66
  4. Step 4: Simplify right side
    1,587.91x = 1,032,897.36
  5. Step 5: Solve for x
    x = 1,032,897.36/1,587.91
  6. Step 6: Final answer
    x = 650.48

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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.