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Finding the Fourth Proportional to 922,278.80, 1,383,418.20 and 257,430.80

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Solution

The fourth proportional to 922,278.80, 1,383,418.20 and 257,430.80 is: 386,146.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    922,278.80 : 1,383,418.20 = 257,430.80 : x
  2. Step 2: Convert to fraction form
    922,278.80/1,383,418.20 = 257,430.80/x
  3. Step 3: Cross multiply
    922,278.80x = 1,383,418.20 × 257,430.80
  4. Step 4: Simplify right side
    922,278.80x = 356,134,453,960.56
  5. Step 5: Solve for x
    x = 356,134,453,960.56/922,278.80
  6. Step 6: Final answer
    x = 386,146.20

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.