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Finding the Fourth Proportional to 589.60, 813.76 and 368.80

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Solution

The fourth proportional to 589.60, 813.76 and 368.80 is: 509.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    589.60 : 813.76 = 368.80 : x
  2. Step 2: Convert to fraction form
    589.60/813.76 = 368.80/x
  3. Step 3: Cross multiply
    589.60x = 813.76 × 368.80
  4. Step 4: Simplify right side
    589.60x = 300,114.69
  5. Step 5: Solve for x
    x = 300,114.69/589.60
  6. Step 6: Final answer
    x = 509.01

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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.