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Finding the Fourth Proportional to 332.50, 459.12 and 288.40

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Solution

The fourth proportional to 332.50, 459.12 and 288.40 is: 398.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    332.50 : 459.12 = 288.40 : x
  2. Step 2: Convert to fraction form
    332.50/459.12 = 288.40/x
  3. Step 3: Cross multiply
    332.50x = 459.12 × 288.40
  4. Step 4: Simplify right side
    332.50x = 132,410.21
  5. Step 5: Solve for x
    x = 132,410.21/332.50
  6. Step 6: Final answer
    x = 398.23

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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.