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Finding the Fourth Proportional to 1,709.80, 2,564.28 and 614.12

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Solution

The fourth proportional to 1,709.80, 2,564.28 and 614.12 is: 921.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,709.80 : 2,564.28 = 614.12 : x
  2. Step 2: Convert to fraction form
    1,709.80/2,564.28 = 614.12/x
  3. Step 3: Cross multiply
    1,709.80x = 2,564.28 × 614.12
  4. Step 4: Simplify right side
    1,709.80x = 1,574,775.63
  5. Step 5: Solve for x
    x = 1,574,775.63/1,709.80
  6. Step 6: Final answer
    x = 921.03

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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.