Home / 778,081.60-1,074,061.84-668,753.12

Finding the Fourth Proportional to 778,081.60, 1,074,061.84 and 668,753.12

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Solution

The fourth proportional to 778,081.60, 1,074,061.84 and 668,753.12 is: 923,145.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,081.60 : 1,074,061.84 = 668,753.12 : x
  2. Step 2: Convert to fraction form
    778,081.60/1,074,061.84 = 668,753.12/x
  3. Step 3: Cross multiply
    778,081.60x = 1,074,061.84 × 668,753.12
  4. Step 4: Simplify right side
    778,081.60x = 718,282,206,572.94
  5. Step 5: Solve for x
    x = 718,282,206,572.94/778,081.60
  6. Step 6: Final answer
    x = 923,145.09

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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.