Home / 778,068.78-1,073,734.02-420,372.78

Finding the Fourth Proportional to 778,068.78, 1,073,734.02 and 420,372.78

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Solution

The fourth proportional to 778,068.78, 1,073,734.02 and 420,372.78 is: 580,113.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,068.78 : 1,073,734.02 = 420,372.78 : x
  2. Step 2: Convert to fraction form
    778,068.78/1,073,734.02 = 420,372.78/x
  3. Step 3: Cross multiply
    778,068.78x = 1,073,734.02 × 420,372.78
  4. Step 4: Simplify right side
    778,068.78x = 451,368,554,967.98
  5. Step 5: Solve for x
    x = 451,368,554,967.98/778,068.78
  6. Step 6: Final answer
    x = 580,113.95

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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.