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Finding the Fourth Proportional to 440.65, 661.16 and 245.40

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Solution

The fourth proportional to 440.65, 661.16 and 245.40 is: 368.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.65 : 661.16 = 245.40 : x
  2. Step 2: Convert to fraction form
    440.65/661.16 = 245.40/x
  3. Step 3: Cross multiply
    440.65x = 661.16 × 245.40
  4. Step 4: Simplify right side
    440.65x = 162,248.66
  5. Step 5: Solve for x
    x = 162,248.66/440.65
  6. Step 6: Final answer
    x = 368.20

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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.