Home / 485,989.28-670,650-284,919.20

Finding the Fourth Proportional to 485,989.28, 670,650 and 284,919.20

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Solution

The fourth proportional to 485,989.28, 670,650 and 284,919.20 is: 393,179.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,989.28 : 670,650 = 284,919.20 : x
  2. Step 2: Convert to fraction form
    485,989.28/670,650 = 284,919.20/x
  3. Step 3: Cross multiply
    485,989.28x = 670,650 × 284,919.20
  4. Step 4: Simplify right side
    485,989.28x = 191,081,061,480
  5. Step 5: Solve for x
    x = 191,081,061,480/485,989.28
  6. Step 6: Final answer
    x = 393,179.58

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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.