Home / 778,215.95-1,073,939.79-438,684.20

Finding the Fourth Proportional to 778,215.95, 1,073,939.79 and 438,684.20

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Solution

The fourth proportional to 778,215.95, 1,073,939.79 and 438,684.20 is: 605,385.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,215.95 : 1,073,939.79 = 438,684.20 : x
  2. Step 2: Convert to fraction form
    778,215.95/1,073,939.79 = 438,684.20/x
  3. Step 3: Cross multiply
    778,215.95x = 1,073,939.79 × 438,684.20
  4. Step 4: Simplify right side
    778,215.95x = 471,120,417,624.32
  5. Step 5: Solve for x
    x = 471,120,417,624.32/778,215.95
  6. Step 6: Final answer
    x = 605,385.20

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Double scale
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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.