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Finding the Fourth Proportional to 589.42, 813.36 and 356.50

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Solution

The fourth proportional to 589.42, 813.36 and 356.50 is: 491.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    589.42 : 813.36 = 356.50 : x
  2. Step 2: Convert to fraction form
    589.42/813.36 = 356.50/x
  3. Step 3: Cross multiply
    589.42x = 813.36 × 356.50
  4. Step 4: Simplify right side
    589.42x = 289,962.84
  5. Step 5: Solve for x
    x = 289,962.84/589.42
  6. Step 6: Final answer
    x = 491.95

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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.