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Finding the Fourth Proportional to 679.12, 937.14 and 384.40

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Solution

The fourth proportional to 679.12, 937.14 and 384.40 is: 530.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.12 : 937.14 = 384.40 : x
  2. Step 2: Convert to fraction form
    679.12/937.14 = 384.40/x
  3. Step 3: Cross multiply
    679.12x = 937.14 × 384.40
  4. Step 4: Simplify right side
    679.12x = 360,236.62
  5. Step 5: Solve for x
    x = 360,236.62/679.12
  6. Step 6: Final answer
    x = 530.45

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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.