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Finding the Fourth Proportional to 440.18, 657.02 and 388.29

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Solution

The fourth proportional to 440.18, 657.02 and 388.29 is: 579.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.18 : 657.02 = 388.29 : x
  2. Step 2: Convert to fraction form
    440.18/657.02 = 388.29/x
  3. Step 3: Cross multiply
    440.18x = 657.02 × 388.29
  4. Step 4: Simplify right side
    440.18x = 255,116.64
  5. Step 5: Solve for x
    x = 255,116.64/440.18
  6. Step 6: Final answer
    x = 579.57

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.