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Finding the Fourth Proportional to 873.73, 1,205.65 and 500.67

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Solution

The fourth proportional to 873.73, 1,205.65 and 500.67 is: 690.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    873.73 : 1,205.65 = 500.67 : x
  2. Step 2: Convert to fraction form
    873.73/1,205.65 = 500.67/x
  3. Step 3: Cross multiply
    873.73x = 1,205.65 × 500.67
  4. Step 4: Simplify right side
    873.73x = 603,630.28
  5. Step 5: Solve for x
    x = 603,630.28/873.73
  6. Step 6: Final answer
    x = 690.87

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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.