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Finding the Fourth Proportional to 649.31, 973.35 and 284.31

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Solution

The fourth proportional to 649.31, 973.35 and 284.31 is: 426.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    649.31 : 973.35 = 284.31 : x
  2. Step 2: Convert to fraction form
    649.31/973.35 = 284.31/x
  3. Step 3: Cross multiply
    649.31x = 973.35 × 284.31
  4. Step 4: Simplify right side
    649.31x = 276,733.14
  5. Step 5: Solve for x
    x = 276,733.14/649.31
  6. Step 6: Final answer
    x = 426.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.