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Finding the Fourth Proportional to 347.02, 520.49 and 90.54

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Solution

The fourth proportional to 347.02, 520.49 and 90.54 is: 135.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.02 : 520.49 = 90.54 : x
  2. Step 2: Convert to fraction form
    347.02/520.49 = 90.54/x
  3. Step 3: Cross multiply
    347.02x = 520.49 × 90.54
  4. Step 4: Simplify right side
    347.02x = 47,125.16
  5. Step 5: Solve for x
    x = 47,125.16/347.02
  6. Step 6: Final answer
    x = 135.80

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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.