Home / 840,941.20-1,261,411.80-486,647.20

Finding the Fourth Proportional to 840,941.20, 1,261,411.80 and 486,647.20

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Solution

The fourth proportional to 840,941.20, 1,261,411.80 and 486,647.20 is: 729,970.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    840,941.20 : 1,261,411.80 = 486,647.20 : x
  2. Step 2: Convert to fraction form
    840,941.20/1,261,411.80 = 486,647.20/x
  3. Step 3: Cross multiply
    840,941.20x = 1,261,411.80 × 486,647.20
  4. Step 4: Simplify right side
    840,941.20x = 613,862,520,516.96
  5. Step 5: Solve for x
    x = 613,862,520,516.96/840,941.20
  6. Step 6: Final answer
    x = 729,970.80

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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.