Home / 827,135.40-1,239,147.90-426,412.20

Finding the Fourth Proportional to 827,135.40, 1,239,147.90 and 426,412.20

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Solution

The fourth proportional to 827,135.40, 1,239,147.90 and 426,412.20 is: 638,816.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    827,135.40 : 1,239,147.90 = 426,412.20 : x
  2. Step 2: Convert to fraction form
    827,135.40/1,239,147.90 = 426,412.20/x
  3. Step 3: Cross multiply
    827,135.40x = 1,239,147.90 × 426,412.20
  4. Step 4: Simplify right side
    827,135.40x = 528,387,782,164.38
  5. Step 5: Solve for x
    x = 528,387,782,164.38/827,135.40
  6. Step 6: Final answer
    x = 638,816.55

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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.