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Finding the Fourth Proportional to 679.53, 938.07 and 469.77

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Solution

The fourth proportional to 679.53, 938.07 and 469.77 is: 648.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.53 : 938.07 = 469.77 : x
  2. Step 2: Convert to fraction form
    679.53/938.07 = 469.77/x
  3. Step 3: Cross multiply
    679.53x = 938.07 × 469.77
  4. Step 4: Simplify right side
    679.53x = 440,677.14
  5. Step 5: Solve for x
    x = 440,677.14/679.53
  6. Step 6: Final answer
    x = 648.50

Related Problems

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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.