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Finding the Fourth Proportional to 1,587.51, 2,381.00 and 433.26

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Solution

The fourth proportional to 1,587.51, 2,381.00 and 433.26 is: 649.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,587.51 : 2,381.00 = 433.26 : x
  2. Step 2: Convert to fraction form
    1,587.51/2,381.00 = 433.26/x
  3. Step 3: Cross multiply
    1,587.51x = 2,381.00 × 433.26
  4. Step 4: Simplify right side
    1,587.51x = 1,031,589.89
  5. Step 5: Solve for x
    x = 1,031,589.89/1,587.51
  6. Step 6: Final answer
    x = 649.82

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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.