Home / 678,734.40-1,018,101.60-342,811.20

Finding the Fourth Proportional to 678,734.40, 1,018,101.60 and 342,811.20

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Solution

The fourth proportional to 678,734.40, 1,018,101.60 and 342,811.20 is: 514,216.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,734.40 : 1,018,101.60 = 342,811.20 : x
  2. Step 2: Convert to fraction form
    678,734.40/1,018,101.60 = 342,811.20/x
  3. Step 3: Cross multiply
    678,734.40x = 1,018,101.60 × 342,811.20
  4. Step 4: Simplify right side
    678,734.40x = 349,016,631,217.92
  5. Step 5: Solve for x
    x = 349,016,631,217.92/678,734.40
  6. Step 6: Final answer
    x = 514,216.80

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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.