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Finding the Fourth Proportional to 571.95, 857.90 and 398.12

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Solution

The fourth proportional to 571.95, 857.90 and 398.12 is: 597.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.95 : 857.90 = 398.12 : x
  2. Step 2: Convert to fraction form
    571.95/857.90 = 398.12/x
  3. Step 3: Cross multiply
    571.95x = 857.90 × 398.12
  4. Step 4: Simplify right side
    571.95x = 341,543.85
  5. Step 5: Solve for x
    x = 341,543.85/571.95
  6. Step 6: Final answer
    x = 597.16

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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.