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Finding the Fourth Proportional to 541.67, 747.78 and 345.45

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Solution

The fourth proportional to 541.67, 747.78 and 345.45 is: 476.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    541.67 : 747.78 = 345.45 : x
  2. Step 2: Convert to fraction form
    541.67/747.78 = 345.45/x
  3. Step 3: Cross multiply
    541.67x = 747.78 × 345.45
  4. Step 4: Simplify right side
    541.67x = 258,320.60
  5. Step 5: Solve for x
    x = 258,320.60/541.67
  6. Step 6: Final answer
    x = 476.90

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Double scale
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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.