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Finding the Fourth Proportional to 1,425.93, 2,139.20 and 604.22

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Solution

The fourth proportional to 1,425.93, 2,139.20 and 604.22 is: 906.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,425.93 : 2,139.20 = 604.22 : x
  2. Step 2: Convert to fraction form
    1,425.93/2,139.20 = 604.22/x
  3. Step 3: Cross multiply
    1,425.93x = 2,139.20 × 604.22
  4. Step 4: Simplify right side
    1,425.93x = 1,292,547.42
  5. Step 5: Solve for x
    x = 1,292,547.42/1,425.93
  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.