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Finding the Fourth Proportional to 560.67, 839.89 and 438.36

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Solution

The fourth proportional to 560.67, 839.89 and 438.36 is: 656.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    560.67 : 839.89 = 438.36 : x
  2. Step 2: Convert to fraction form
    560.67/839.89 = 438.36/x
  3. Step 3: Cross multiply
    560.67x = 839.89 × 438.36
  4. Step 4: Simplify right side
    560.67x = 368,174.18
  5. Step 5: Solve for x
    x = 368,174.18/560.67
  6. Step 6: Final answer
    x = 656.67

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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.