Home / 257,780.40-386,233.20-213,165.60

Finding the Fourth Proportional to 257,780.40, 386,233.20 and 213,165.60

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Solution

The fourth proportional to 257,780.40, 386,233.20 and 213,165.60 is: 319,386.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,780.40 : 386,233.20 = 213,165.60 : x
  2. Step 2: Convert to fraction form
    257,780.40/386,233.20 = 213,165.60/x
  3. Step 3: Cross multiply
    257,780.40x = 386,233.20 × 213,165.60
  4. Step 4: Simplify right side
    257,780.40x = 82,331,631,817.92
  5. Step 5: Solve for x
    x = 82,331,631,817.92/257,780.40
  6. Step 6: Final answer
    x = 319,386.70

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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.