Home / 778,069.28-1,073,734.71-420,373.28

Finding the Fourth Proportional to 778,069.28, 1,073,734.71 and 420,373.28

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Solution

The fourth proportional to 778,069.28, 1,073,734.71 and 420,373.28 is: 580,114.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,069.28 : 1,073,734.71 = 420,373.28 : x
  2. Step 2: Convert to fraction form
    778,069.28/1,073,734.71 = 420,373.28/x
  3. Step 3: Cross multiply
    778,069.28x = 1,073,734.71 × 420,373.28
  4. Step 4: Simplify right side
    778,069.28x = 451,369,381,892.55
  5. Step 5: Solve for x
    x = 451,369,381,892.55/778,069.28
  6. Step 6: Final answer
    x = 580,114.64

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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.