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Finding the Fourth Proportional to 679.15, 937.12 and 384.38

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Solution

The fourth proportional to 679.15, 937.12 and 384.38 is: 530.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.15 : 937.12 = 384.38 : x
  2. Step 2: Convert to fraction form
    679.15/937.12 = 384.38/x
  3. Step 3: Cross multiply
    679.15x = 937.12 × 384.38
  4. Step 4: Simplify right side
    679.15x = 360,210.19
  5. Step 5: Solve for x
    x = 360,210.19/679.15
  6. Step 6: Final answer
    x = 530.38

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1.5x scale

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.