Home / 257,440.30-386,196.90-79,928.80

Finding the Fourth Proportional to 257,440.30, 386,196.90 and 79,928.80

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Solution

The fourth proportional to 257,440.30, 386,196.90 and 79,928.80 is: 119,904.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,440.30 : 386,196.90 = 79,928.80 : x
  2. Step 2: Convert to fraction form
    257,440.30/386,196.90 = 79,928.80/x
  3. Step 3: Cross multiply
    257,440.30x = 386,196.90 × 79,928.80
  4. Step 4: Simplify right side
    257,440.30x = 30,868,254,780.72
  5. Step 5: Solve for x
    x = 30,868,254,780.72/257,440.30
  6. Step 6: Final answer
    x = 119,904.52

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1.5x scale

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.