Home / 778,128.34-1,073,817.11-420,432.34

Finding the Fourth Proportional to 778,128.34, 1,073,817.11 and 420,432.34

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Solution

The fourth proportional to 778,128.34, 1,073,817.11 and 420,432.34 is: 580,196.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,128.34 : 1,073,817.11 = 420,432.34 : x
  2. Step 2: Convert to fraction form
    778,128.34/1,073,817.11 = 420,432.34/x
  3. Step 3: Cross multiply
    778,128.34x = 1,073,817.11 × 420,432.34
  4. Step 4: Simplify right side
    778,128.34x = 451,467,440,289.34
  5. Step 5: Solve for x
    x = 451,467,440,289.34/778,128.34
  6. Step 6: Final answer
    x = 580,196.63

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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.