Home / 1,138,306.32-1,708,340.76-428,979.60

Finding the Fourth Proportional to 1,138,306.32, 1,708,340.76 and 428,979.60

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Solution

The fourth proportional to 1,138,306.32, 1,708,340.76 and 428,979.60 is: 643,801.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,138,306.32 : 1,708,340.76 = 428,979.60 : x
  2. Step 2: Convert to fraction form
    1,138,306.32/1,708,340.76 = 428,979.60/x
  3. Step 3: Cross multiply
    1,138,306.32x = 1,708,340.76 × 428,979.60
  4. Step 4: Simplify right side
    1,138,306.32x = 732,843,335,888.50
  5. Step 5: Solve for x
    x = 732,843,335,888.50/1,138,306.32
  6. Step 6: Final answer
    x = 643,801.52

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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.