Home / 678,601.20-1,017,901.80-620,540.40

Finding the Fourth Proportional to 678,601.20, 1,017,901.80 and 620,540.40

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Solution

The fourth proportional to 678,601.20, 1,017,901.80 and 620,540.40 is: 930,810.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,601.20 : 1,017,901.80 = 620,540.40 : x
  2. Step 2: Convert to fraction form
    678,601.20/1,017,901.80 = 620,540.40/x
  3. Step 3: Cross multiply
    678,601.20x = 1,017,901.80 × 620,540.40
  4. Step 4: Simplify right side
    678,601.20x = 631,649,190,132.72
  5. Step 5: Solve for x
    x = 631,649,190,132.72/678,601.20
  6. Step 6: Final answer
    x = 930,810.60

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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.