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Finding the Fourth Proportional to 364.78, 546.91 and 148.18

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Solution

The fourth proportional to 364.78, 546.91 and 148.18 is: 222.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    364.78 : 546.91 = 148.18 : x
  2. Step 2: Convert to fraction form
    364.78/546.91 = 148.18/x
  3. Step 3: Cross multiply
    364.78x = 546.91 × 148.18
  4. Step 4: Simplify right side
    364.78x = 81,041.12
  5. Step 5: Solve for x
    x = 81,041.12/364.78
  6. Step 6: Final answer
    x = 222.16

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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.