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Finding the Fourth Proportional to 601.19, 829.47 and 391.67

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Solution

The fourth proportional to 601.19, 829.47 and 391.67 is: 540.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    601.19 : 829.47 = 391.67 : x
  2. Step 2: Convert to fraction form
    601.19/829.47 = 391.67/x
  3. Step 3: Cross multiply
    601.19x = 829.47 × 391.67
  4. Step 4: Simplify right side
    601.19x = 324,877.97
  5. Step 5: Solve for x
    x = 324,877.97/601.19
  6. Step 6: Final answer
    x = 540.39

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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.