Home / 819,040.80-1,228,561.20-258,002.40

Finding the Fourth Proportional to 819,040.80, 1,228,561.20 and 258,002.40

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Solution

The fourth proportional to 819,040.80, 1,228,561.20 and 258,002.40 is: 387,003.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,040.80 : 1,228,561.20 = 258,002.40 : x
  2. Step 2: Convert to fraction form
    819,040.80/1,228,561.20 = 258,002.40/x
  3. Step 3: Cross multiply
    819,040.80x = 1,228,561.20 × 258,002.40
  4. Step 4: Simplify right side
    819,040.80x = 316,971,738,146.88
  5. Step 5: Solve for x
    x = 316,971,738,146.88/819,040.80
  6. Step 6: Final answer
    x = 387,003.60

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Double scale
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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.