Home / 1,398,278.40-2,098,972.80-768,422.40

Finding the Fourth Proportional to 1,398,278.40, 2,098,972.80 and 768,422.40

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Solution

The fourth proportional to 1,398,278.40, 2,098,972.80 and 768,422.40 is: 1,153,488.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,398,278.40 : 2,098,972.80 = 768,422.40 : x
  2. Step 2: Convert to fraction form
    1,398,278.40/2,098,972.80 = 768,422.40/x
  3. Step 3: Cross multiply
    1,398,278.40x = 2,098,972.80 × 768,422.40
  4. Step 4: Simplify right side
    1,398,278.40x = 1,612,897,716,510.72
  5. Step 5: Solve for x
    x = 1,612,897,716,510.72/1,398,278.40
  6. Step 6: Final answer
    x = 1,153,488.26

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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.