Home / 1,286,306.40-1,928,077.20-487,279.20

Finding the Fourth Proportional to 1,286,306.40, 1,928,077.20 and 487,279.20

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Solution

The fourth proportional to 1,286,306.40, 1,928,077.20 and 487,279.20 is: 730,395.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,286,306.40 : 1,928,077.20 = 487,279.20 : x
  2. Step 2: Convert to fraction form
    1,286,306.40/1,928,077.20 = 487,279.20/x
  3. Step 3: Cross multiply
    1,286,306.40x = 1,928,077.20 × 487,279.20
  4. Step 4: Simplify right side
    1,286,306.40x = 939,511,915,554.24
  5. Step 5: Solve for x
    x = 939,511,915,554.24/1,286,306.40
  6. Step 6: Final answer
    x = 730,395.12

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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.