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Finding the Fourth Proportional to 589.96, 813.38 and 393.32

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Solution

The fourth proportional to 589.96, 813.38 and 393.32 is: 542.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    589.96 : 813.38 = 393.32 : x
  2. Step 2: Convert to fraction form
    589.96/813.38 = 393.32/x
  3. Step 3: Cross multiply
    589.96x = 813.38 × 393.32
  4. Step 4: Simplify right side
    589.96x = 319,918.62
  5. Step 5: Solve for x
    x = 319,918.62/589.96
  6. Step 6: Final answer
    x = 542.27

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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.