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Finding the Fourth Proportional to 1,436.12, 2,153.62 and 571

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Solution

The fourth proportional to 1,436.12, 2,153.62 and 571 is: 856.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,436.12 : 2,153.62 = 571 : x
  2. Step 2: Convert to fraction form
    1,436.12/2,153.62 = 571/x
  3. Step 3: Cross multiply
    1,436.12x = 2,153.62 × 571
  4. Step 4: Simplify right side
    1,436.12x = 1,229,717.02
  5. Step 5: Solve for x
    x = 1,229,717.02/1,436.12
  6. Step 6: Final answer
    x = 856.28

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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.