Home / 257,416.20-386,124.30-212,801.40

Finding the Fourth Proportional to 257,416.20, 386,124.30 and 212,801.40

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Solution

The fourth proportional to 257,416.20, 386,124.30 and 212,801.40 is: 319,202.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,416.20 : 386,124.30 = 212,801.40 : x
  2. Step 2: Convert to fraction form
    257,416.20/386,124.30 = 212,801.40/x
  3. Step 3: Cross multiply
    257,416.20x = 386,124.30 × 212,801.40
  4. Step 4: Simplify right side
    257,416.20x = 82,167,791,614.02
  5. Step 5: Solve for x
    x = 82,167,791,614.02/257,416.20
  6. Step 6: Final answer
    x = 319,202.10

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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.