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Finding the Fourth Proportional to 1,666.28, 2,500.14 and 570.80

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Solution

The fourth proportional to 1,666.28, 2,500.14 and 570.80 is: 856.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,666.28 : 2,500.14 = 570.80 : x
  2. Step 2: Convert to fraction form
    1,666.28/2,500.14 = 570.80/x
  3. Step 3: Cross multiply
    1,666.28x = 2,500.14 × 570.80
  4. Step 4: Simplify right side
    1,666.28x = 1,427,079.91
  5. Step 5: Solve for x
    x = 1,427,079.91/1,666.28
  6. Step 6: Final answer
    x = 856.45

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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.