Home / 920,387.20-1,380,777.92-521,216.64

Finding the Fourth Proportional to 920,387.20, 1,380,777.92 and 521,216.64

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Solution

The fourth proportional to 920,387.20, 1,380,777.92 and 521,216.64 is: 781,936.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    920,387.20 : 1,380,777.92 = 521,216.64 : x
  2. Step 2: Convert to fraction form
    920,387.20/1,380,777.92 = 521,216.64/x
  3. Step 3: Cross multiply
    920,387.20x = 1,380,777.92 × 521,216.64
  4. Step 4: Simplify right side
    920,387.20x = 719,684,428,048.59
  5. Step 5: Solve for x
    x = 719,684,428,048.59/920,387.20
  6. Step 6: Final answer
    x = 781,936.59

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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.