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Finding the Fourth Proportional to 469.47, 647.90 and 270.37

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Solution

The fourth proportional to 469.47, 647.90 and 270.37 is: 373.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    469.47 : 647.90 = 270.37 : x
  2. Step 2: Convert to fraction form
    469.47/647.90 = 270.37/x
  3. Step 3: Cross multiply
    469.47x = 647.90 × 270.37
  4. Step 4: Simplify right side
    469.47x = 175,170.77
  5. Step 5: Solve for x
    x = 175,170.77/469.47
  6. Step 6: Final answer
    x = 373.12

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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.