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Finding the Fourth Proportional to 873.06, 1,309.05 and 385.50

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Solution

The fourth proportional to 873.06, 1,309.05 and 385.50 is: 578.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    873.06 : 1,309.05 = 385.50 : x
  2. Step 2: Convert to fraction form
    873.06/1,309.05 = 385.50/x
  3. Step 3: Cross multiply
    873.06x = 1,309.05 × 385.50
  4. Step 4: Simplify right side
    873.06x = 504,638.78
  5. Step 5: Solve for x
    x = 504,638.78/873.06
  6. Step 6: Final answer
    x = 578.01

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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.