Home / 812,746.28-1,219,177.85-280,259.61

Finding the Fourth Proportional to 812,746.28, 1,219,177.85 and 280,259.61

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Solution

The fourth proportional to 812,746.28, 1,219,177.85 and 280,259.61 is: 420,409.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,746.28 : 1,219,177.85 = 280,259.61 : x
  2. Step 2: Convert to fraction form
    812,746.28/1,219,177.85 = 280,259.61/x
  3. Step 3: Cross multiply
    812,746.28x = 1,219,177.85 × 280,259.61
  4. Step 4: Simplify right side
    812,746.28x = 341,686,302,788.42
  5. Step 5: Solve for x
    x = 341,686,302,788.42/812,746.28
  6. Step 6: Final answer
    x = 420,409.55

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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.