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Finding the Fourth Proportional to 679.51, 937.70 and 384.76

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Solution

The fourth proportional to 679.51, 937.70 and 384.76 is: 530.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.51 : 937.70 = 384.76 : x
  2. Step 2: Convert to fraction form
    679.51/937.70 = 384.76/x
  3. Step 3: Cross multiply
    679.51x = 937.70 × 384.76
  4. Step 4: Simplify right side
    679.51x = 360,789.45
  5. Step 5: Solve for x
    x = 360,789.45/679.51
  6. Step 6: Final answer
    x = 530.96

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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.