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Finding the Fourth Proportional to 522,228.43, 720,789.92 and 318,237.20

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Solution

The fourth proportional to 522,228.43, 720,789.92 and 318,237.20 is: 439,237.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,228.43 : 720,789.92 = 318,237.20 : x
  2. Step 2: Convert to fraction form
    522,228.43/720,789.92 = 318,237.20/x
  3. Step 3: Cross multiply
    522,228.43x = 720,789.92 × 318,237.20
  4. Step 4: Simplify right side
    522,228.43x = 229,382,169,803.48
  5. Step 5: Solve for x
    x = 229,382,169,803.48/522,228.43
  6. Step 6: Final answer
    x = 439,237.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.