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Finding the Fourth Proportional to 426,553.32, 640,223.58 and 216,338.88

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Solution

The fourth proportional to 426,553.32, 640,223.58 and 216,338.88 is: 324,707.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,553.32 : 640,223.58 = 216,338.88 : x
  2. Step 2: Convert to fraction form
    426,553.32/640,223.58 = 216,338.88/x
  3. Step 3: Cross multiply
    426,553.32x = 640,223.58 × 216,338.88
  4. Step 4: Simplify right side
    426,553.32x = 138,505,252,246.79
  5. Step 5: Solve for x
    x = 138,505,252,246.79/426,553.32
  6. Step 6: Final answer
    x = 324,707.95

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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.