Home / 386,042.40-578,869.20-228,319.20

Finding the Fourth Proportional to 386,042.40, 578,869.20 and 228,319.20

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Solution

The fourth proportional to 386,042.40, 578,869.20 and 228,319.20 is: 342,363.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,042.40 : 578,869.20 = 228,319.20 : x
  2. Step 2: Convert to fraction form
    386,042.40/578,869.20 = 228,319.20/x
  3. Step 3: Cross multiply
    386,042.40x = 578,869.20 × 228,319.20
  4. Step 4: Simplify right side
    386,042.40x = 132,166,952,648.64
  5. Step 5: Solve for x
    x = 132,166,952,648.64/386,042.40
  6. Step 6: Final answer
    x = 342,363.82

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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.