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Finding the Fourth Proportional to 2,587.90, 3,571.24 and 1,409

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Solution

The fourth proportional to 2,587.90, 3,571.24 and 1,409 is: 1,944.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,587.90 : 3,571.24 = 1,409 : x
  2. Step 2: Convert to fraction form
    2,587.90/3,571.24 = 1,409/x
  3. Step 3: Cross multiply
    2,587.90x = 3,571.24 × 1,409
  4. Step 4: Simplify right side
    2,587.90x = 5,031,877.16
  5. Step 5: Solve for x
    x = 5,031,877.16/2,587.90
  6. Step 6: Final answer
    x = 1,944.39

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.