Home / 778,712.25-1,074,622.92-421,016.25

Finding the Fourth Proportional to 778,712.25, 1,074,622.92 and 421,016.25

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Solution

The fourth proportional to 778,712.25, 1,074,622.92 and 421,016.25 is: 581,002.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,712.25 : 1,074,622.92 = 421,016.25 : x
  2. Step 2: Convert to fraction form
    778,712.25/1,074,622.92 = 421,016.25/x
  3. Step 3: Cross multiply
    778,712.25x = 1,074,622.92 × 421,016.25
  4. Step 4: Simplify right side
    778,712.25x = 452,433,711,942.45
  5. Step 5: Solve for x
    x = 452,433,711,942.45/778,712.25
  6. Step 6: Final answer
    x = 581,002.43

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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.