Home / 778,255.20-1,073,977.76-438,723.68

Finding the Fourth Proportional to 778,255.20, 1,073,977.76 and 438,723.68

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Solution

The fourth proportional to 778,255.20, 1,073,977.76 and 438,723.68 is: 605,430.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,255.20 : 1,073,977.76 = 438,723.68 : x
  2. Step 2: Convert to fraction form
    778,255.20/1,073,977.76 = 438,723.68/x
  3. Step 3: Cross multiply
    778,255.20x = 1,073,977.76 × 438,723.68
  4. Step 4: Simplify right side
    778,255.20x = 471,179,475,105.36
  5. Step 5: Solve for x
    x = 471,179,475,105.36/778,255.20
  6. Step 6: Final answer
    x = 605,430.55

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1.5x scale

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.