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Finding the Fourth Proportional to 440.16, 607.12 and 290.80

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Solution

The fourth proportional to 440.16, 607.12 and 290.80 is: 401.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.16 : 607.12 = 290.80 : x
  2. Step 2: Convert to fraction form
    440.16/607.12 = 290.80/x
  3. Step 3: Cross multiply
    440.16x = 607.12 × 290.80
  4. Step 4: Simplify right side
    440.16x = 176,552.20
  5. Step 5: Solve for x
    x = 176,552.20/440.16
  6. Step 6: Final answer
    x = 401.11

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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.