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Finding the Fourth Proportional to 459.24, 688.56 and 321.52

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Solution

The fourth proportional to 459.24, 688.56 and 321.52 is: 482.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    459.24 : 688.56 = 321.52 : x
  2. Step 2: Convert to fraction form
    459.24/688.56 = 321.52/x
  3. Step 3: Cross multiply
    459.24x = 688.56 × 321.52
  4. Step 4: Simplify right side
    459.24x = 221,385.81
  5. Step 5: Solve for x
    x = 221,385.81/459.24
  6. Step 6: Final answer
    x = 482.07

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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.