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Finding the Fourth Proportional to 943.18, 1,415.19 and 395.48

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Solution

The fourth proportional to 943.18, 1,415.19 and 395.48 is: 593.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    943.18 : 1,415.19 = 395.48 : x
  2. Step 2: Convert to fraction form
    943.18/1,415.19 = 395.48/x
  3. Step 3: Cross multiply
    943.18x = 1,415.19 × 395.48
  4. Step 4: Simplify right side
    943.18x = 559,679.34
  5. Step 5: Solve for x
    x = 559,679.34/943.18
  6. Step 6: Final answer
    x = 593.40

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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.