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Finding the Fourth Proportional to 469.61, 647.91 and 270.39

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Solution

The fourth proportional to 469.61, 647.91 and 270.39 is: 373.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    469.61 : 647.91 = 270.39 : x
  2. Step 2: Convert to fraction form
    469.61/647.91 = 270.39/x
  3. Step 3: Cross multiply
    469.61x = 647.91 × 270.39
  4. Step 4: Simplify right side
    469.61x = 175,188.38
  5. Step 5: Solve for x
    x = 175,188.38/469.61
  6. Step 6: Final answer
    x = 373.05

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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.