Home / 426,535.23-640,196.51-216,320.79

Finding the Fourth Proportional to 426,535.23, 640,196.51 and 216,320.79

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Solution

The fourth proportional to 426,535.23, 640,196.51 and 216,320.79 is: 324,680.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,535.23 : 640,196.51 = 216,320.79 : x
  2. Step 2: Convert to fraction form
    426,535.23/640,196.51 = 216,320.79/x
  3. Step 3: Cross multiply
    426,535.23x = 640,196.51 × 216,320.79
  4. Step 4: Simplify right side
    426,535.23x = 138,487,813,716.84
  5. Step 5: Solve for x
    x = 138,487,813,716.84/426,535.23
  6. Step 6: Final answer
    x = 324,680.83

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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.