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Finding the Fourth Proportional to 597.40, 823.80 and 387.67

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Solution

The fourth proportional to 597.40, 823.80 and 387.67 is: 534.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    597.40 : 823.80 = 387.67 : x
  2. Step 2: Convert to fraction form
    597.40/823.80 = 387.67/x
  3. Step 3: Cross multiply
    597.40x = 823.80 × 387.67
  4. Step 4: Simplify right side
    597.40x = 319,362.55
  5. Step 5: Solve for x
    x = 319,362.55/597.40
  6. Step 6: Final answer
    x = 534.59

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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.