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Finding the Fourth Proportional to 614.70, 847.80 and 393.71

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Solution

The fourth proportional to 614.70, 847.80 and 393.71 is: 543.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.70 : 847.80 = 393.71 : x
  2. Step 2: Convert to fraction form
    614.70/847.80 = 393.71/x
  3. Step 3: Cross multiply
    614.70x = 847.80 × 393.71
  4. Step 4: Simplify right side
    614.70x = 333,783.10
  5. Step 5: Solve for x
    x = 333,783.10/614.70
  6. Step 6: Final answer
    x = 543.00

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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.