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Finding the Fourth Proportional to 873.37, 1,310.12 and 386.34

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Solution

The fourth proportional to 873.37, 1,310.12 and 386.34 is: 579.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    873.37 : 1,310.12 = 386.34 : x
  2. Step 2: Convert to fraction form
    873.37/1,310.12 = 386.34/x
  3. Step 3: Cross multiply
    873.37x = 1,310.12 × 386.34
  4. Step 4: Simplify right side
    873.37x = 506,151.76
  5. Step 5: Solve for x
    x = 506,151.76/873.37
  6. Step 6: Final answer
    x = 579.54

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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.