Home / 286,785.20-395,768.10-157,729.28

Finding the Fourth Proportional to 286,785.20, 395,768.10 and 157,729.28

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Solution

The fourth proportional to 286,785.20, 395,768.10 and 157,729.28 is: 217,668.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,785.20 : 395,768.10 = 157,729.28 : x
  2. Step 2: Convert to fraction form
    286,785.20/395,768.10 = 157,729.28/x
  3. Step 3: Cross multiply
    286,785.20x = 395,768.10 × 157,729.28
  4. Step 4: Simplify right side
    286,785.20x = 62,424,217,459.97
  5. Step 5: Solve for x
    x = 62,424,217,459.97/286,785.20
  6. Step 6: Final answer
    x = 217,668.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.