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Finding the Fourth Proportional to 388.95, 537.26 and 290.53

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Solution

The fourth proportional to 388.95, 537.26 and 290.53 is: 401.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.95 : 537.26 = 290.53 : x
  2. Step 2: Convert to fraction form
    388.95/537.26 = 290.53/x
  3. Step 3: Cross multiply
    388.95x = 537.26 × 290.53
  4. Step 4: Simplify right side
    388.95x = 156,091.13
  5. Step 5: Solve for x
    x = 156,091.13/388.95
  6. Step 6: Final answer
    x = 401.32

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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.