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Finding the Fourth Proportional to 589.30, 813.36 and 340.80

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Solution

The fourth proportional to 589.30, 813.36 and 340.80 is: 470.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    589.30 : 813.36 = 340.80 : x
  2. Step 2: Convert to fraction form
    589.30/813.36 = 340.80/x
  3. Step 3: Cross multiply
    589.30x = 813.36 × 340.80
  4. Step 4: Simplify right side
    589.30x = 277,193.09
  5. Step 5: Solve for x
    x = 277,193.09/589.30
  6. Step 6: Final answer
    x = 470.38

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1.5x scale

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.