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Finding the Fourth Proportional to 679.47, 937.71 and 384.74

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Solution

The fourth proportional to 679.47, 937.71 and 384.74 is: 530.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.47 : 937.71 = 384.74 : x
  2. Step 2: Convert to fraction form
    679.47/937.71 = 384.74/x
  3. Step 3: Cross multiply
    679.47x = 937.71 × 384.74
  4. Step 4: Simplify right side
    679.47x = 360,774.55
  5. Step 5: Solve for x
    x = 360,774.55/679.47
  6. Step 6: Final answer
    x = 530.96

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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.