Home / 1,315,306.20-1,972,959.30-428,842.20

Finding the Fourth Proportional to 1,315,306.20, 1,972,959.30 and 428,842.20

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Solution

The fourth proportional to 1,315,306.20, 1,972,959.30 and 428,842.20 is: 643,263.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315,306.20 : 1,972,959.30 = 428,842.20 : x
  2. Step 2: Convert to fraction form
    1,315,306.20/1,972,959.30 = 428,842.20/x
  3. Step 3: Cross multiply
    1,315,306.20x = 1,972,959.30 × 428,842.20
  4. Step 4: Simplify right side
    1,315,306.20x = 846,088,206,722.46
  5. Step 5: Solve for x
    x = 846,088,206,722.46/1,315,306.20
  6. Step 6: Final answer
    x = 643,263.30

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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.