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Finding the Fourth Proportional to 939.95, 1,408.16 and 529.39

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Solution

The fourth proportional to 939.95, 1,408.16 and 529.39 is: 793.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    939.95 : 1,408.16 = 529.39 : x
  2. Step 2: Convert to fraction form
    939.95/1,408.16 = 529.39/x
  3. Step 3: Cross multiply
    939.95x = 1,408.16 × 529.39
  4. Step 4: Simplify right side
    939.95x = 745,459.50
  5. Step 5: Solve for x
    x = 745,459.50/939.95
  6. Step 6: Final answer
    x = 793.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.