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Finding the Fourth Proportional to 388.71, 535.90 and 322.07

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Solution

The fourth proportional to 388.71, 535.90 and 322.07 is: 444.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.71 : 535.90 = 322.07 : x
  2. Step 2: Convert to fraction form
    388.71/535.90 = 322.07/x
  3. Step 3: Cross multiply
    388.71x = 535.90 × 322.07
  4. Step 4: Simplify right side
    388.71x = 172,595.94
  5. Step 5: Solve for x
    x = 172,595.94/388.71
  6. Step 6: Final answer
    x = 444.03

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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.