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Finding the Fourth Proportional to 440.19, 606.06 and 387.69

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Solution

The fourth proportional to 440.19, 606.06 and 387.69 is: 533.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.19 : 606.06 = 387.69 : x
  2. Step 2: Convert to fraction form
    440.19/606.06 = 387.69/x
  3. Step 3: Cross multiply
    440.19x = 606.06 × 387.69
  4. Step 4: Simplify right side
    440.19x = 234,963.40
  5. Step 5: Solve for x
    x = 234,963.40/440.19
  6. Step 6: Final answer
    x = 533.78

Related Problems

Find fourth proportional to 220.10, 303.03 and 193.85
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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.