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Finding the Fourth Proportional to 1,574.28, 2,172.52 and 866.20

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Solution

The fourth proportional to 1,574.28, 2,172.52 and 866.20 is: 1,195.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,574.28 : 2,172.52 = 866.20 : x
  2. Step 2: Convert to fraction form
    1,574.28/2,172.52 = 866.20/x
  3. Step 3: Cross multiply
    1,574.28x = 2,172.52 × 866.20
  4. Step 4: Simplify right side
    1,574.28x = 1,881,837.98
  5. Step 5: Solve for x
    x = 1,881,837.98/1,574.28
  6. Step 6: Final answer
    x = 1,195.36

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1.5x scale

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.