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Finding the Fourth Proportional to 1,349.02, 1,859.65 and 851.28

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Solution

The fourth proportional to 1,349.02, 1,859.65 and 851.28 is: 1,173.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,349.02 : 1,859.65 = 851.28 : x
  2. Step 2: Convert to fraction form
    1,349.02/1,859.65 = 851.28/x
  3. Step 3: Cross multiply
    1,349.02x = 1,859.65 × 851.28
  4. Step 4: Simplify right side
    1,349.02x = 1,583,082.85
  5. Step 5: Solve for x
    x = 1,583,082.85/1,349.02
  6. Step 6: Final answer
    x = 1,173.51

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1.5x scale

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.