Home / 858,807.20-1,288,210.80-438,903.20

Finding the Fourth Proportional to 858,807.20, 1,288,210.80 and 438,903.20

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Solution

The fourth proportional to 858,807.20, 1,288,210.80 and 438,903.20 is: 658,354.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,807.20 : 1,288,210.80 = 438,903.20 : x
  2. Step 2: Convert to fraction form
    858,807.20/1,288,210.80 = 438,903.20/x
  3. Step 3: Cross multiply
    858,807.20x = 1,288,210.80 × 438,903.20
  4. Step 4: Simplify right side
    858,807.20x = 565,399,842,394.56
  5. Step 5: Solve for x
    x = 565,399,842,394.56/858,807.20
  6. Step 6: Final answer
    x = 658,354.80

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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.