Home / 858,812.40-1,288,218.60-438,908.40

Finding the Fourth Proportional to 858,812.40, 1,288,218.60 and 438,908.40

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Solution

The fourth proportional to 858,812.40, 1,288,218.60 and 438,908.40 is: 658,362.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,812.40 : 1,288,218.60 = 438,908.40 : x
  2. Step 2: Convert to fraction form
    858,812.40/1,288,218.60 = 438,908.40/x
  3. Step 3: Cross multiply
    858,812.40x = 1,288,218.60 × 438,908.40
  4. Step 4: Simplify right side
    858,812.40x = 565,409,964,576.24
  5. Step 5: Solve for x
    x = 565,409,964,576.24/858,812.40
  6. Step 6: Final answer
    x = 658,362.60

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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.