Home / 807,810.40-1,211,715.60-409,679.20

Finding the Fourth Proportional to 807,810.40, 1,211,715.60 and 409,679.20

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Solution

The fourth proportional to 807,810.40, 1,211,715.60 and 409,679.20 is: 614,518.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    807,810.40 : 1,211,715.60 = 409,679.20 : x
  2. Step 2: Convert to fraction form
    807,810.40/1,211,715.60 = 409,679.20/x
  3. Step 3: Cross multiply
    807,810.40x = 1,211,715.60 × 409,679.20
  4. Step 4: Simplify right side
    807,810.40x = 496,414,677,635.52
  5. Step 5: Solve for x
    x = 496,414,677,635.52/807,810.40
  6. Step 6: Final answer
    x = 614,518.80

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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.