Home / 818,928.75-1,129,520.12-542,787.20

Finding the Fourth Proportional to 818,928.75, 1,129,520.12 and 542,787.20

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Solution

The fourth proportional to 818,928.75, 1,129,520.12 and 542,787.20 is: 748,647.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    818,928.75 : 1,129,520.12 = 542,787.20 : x
  2. Step 2: Convert to fraction form
    818,928.75/1,129,520.12 = 542,787.20/x
  3. Step 3: Cross multiply
    818,928.75x = 1,129,520.12 × 542,787.20
  4. Step 4: Simplify right side
    818,928.75x = 613,089,063,278.46
  5. Step 5: Solve for x
    x = 613,089,063,278.46/818,928.75
  6. Step 6: Final answer
    x = 748,647.62

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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.