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Finding the Fourth Proportional to 873.54, 1,311.06 and 507.81

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Solution

The fourth proportional to 873.54, 1,311.06 and 507.81 is: 762.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    873.54 : 1,311.06 = 507.81 : x
  2. Step 2: Convert to fraction form
    873.54/1,311.06 = 507.81/x
  3. Step 3: Cross multiply
    873.54x = 1,311.06 × 507.81
  4. Step 4: Simplify right side
    873.54x = 665,769.38
  5. Step 5: Solve for x
    x = 665,769.38/873.54
  6. Step 6: Final answer
    x = 762.15

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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.