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Finding the Fourth Proportional to 1,425.87, 2,139.62 and 604.08

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Solution

The fourth proportional to 1,425.87, 2,139.62 and 604.08 is: 906.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,425.87 : 2,139.62 = 604.08 : x
  2. Step 2: Convert to fraction form
    1,425.87/2,139.62 = 604.08/x
  3. Step 3: Cross multiply
    1,425.87x = 2,139.62 × 604.08
  4. Step 4: Simplify right side
    1,425.87x = 1,292,498.63
  5. Step 5: Solve for x
    x = 1,292,498.63/1,425.87
  6. Step 6: Final answer
    x = 906.46

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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.