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Finding the Fourth Proportional to 589.60, 813.54 and 515.62

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Solution

The fourth proportional to 589.60, 813.54 and 515.62 is: 711.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    589.60 : 813.54 = 515.62 : x
  2. Step 2: Convert to fraction form
    589.60/813.54 = 515.62/x
  3. Step 3: Cross multiply
    589.60x = 813.54 × 515.62
  4. Step 4: Simplify right side
    589.60x = 419,477.49
  5. Step 5: Solve for x
    x = 419,477.49/589.60
  6. Step 6: Final answer
    x = 711.46

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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.