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Finding the Fourth Proportional to 930.89, 1,396.55 and 346.30

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Solution

The fourth proportional to 930.89, 1,396.55 and 346.30 is: 519.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    930.89 : 1,396.55 = 346.30 : x
  2. Step 2: Convert to fraction form
    930.89/1,396.55 = 346.30/x
  3. Step 3: Cross multiply
    930.89x = 1,396.55 × 346.30
  4. Step 4: Simplify right side
    930.89x = 483,623.53
  5. Step 5: Solve for x
    x = 483,623.53/930.89
  6. Step 6: Final answer
    x = 519.53

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1.5x scale

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.