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Finding the Fourth Proportional to 458.84, 688.80 and 253.38

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Solution

The fourth proportional to 458.84, 688.80 and 253.38 is: 380.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    458.84 : 688.80 = 253.38 : x
  2. Step 2: Convert to fraction form
    458.84/688.80 = 253.38/x
  3. Step 3: Cross multiply
    458.84x = 688.80 × 253.38
  4. Step 4: Simplify right side
    458.84x = 174,528.14
  5. Step 5: Solve for x
    x = 174,528.14/458.84
  6. Step 6: Final answer
    x = 380.37

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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.