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Finding the Fourth Proportional to 431.63, 647.56 and 248.62

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Solution

The fourth proportional to 431.63, 647.56 and 248.62 is: 373.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    431.63 : 647.56 = 248.62 : x
  2. Step 2: Convert to fraction form
    431.63/647.56 = 248.62/x
  3. Step 3: Cross multiply
    431.63x = 647.56 × 248.62
  4. Step 4: Simplify right side
    431.63x = 160,995.75
  5. Step 5: Solve for x
    x = 160,995.75/431.63
  6. Step 6: Final answer
    x = 373.00

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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.