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Finding the Fourth Proportional to 582.42, 803.78 and 385.59

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Solution

The fourth proportional to 582.42, 803.78 and 385.59 is: 532.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    582.42 : 803.78 = 385.59 : x
  2. Step 2: Convert to fraction form
    582.42/803.78 = 385.59/x
  3. Step 3: Cross multiply
    582.42x = 803.78 × 385.59
  4. Step 4: Simplify right side
    582.42x = 309,929.53
  5. Step 5: Solve for x
    x = 309,929.53/582.42
  6. Step 6: Final answer
    x = 532.14

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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.