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Finding the Fourth Proportional to 1,047.89, 1,571.81 and 354.35

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Solution

The fourth proportional to 1,047.89, 1,571.81 and 354.35 is: 531.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,047.89 : 1,571.81 = 354.35 : x
  2. Step 2: Convert to fraction form
    1,047.89/1,571.81 = 354.35/x
  3. Step 3: Cross multiply
    1,047.89x = 1,571.81 × 354.35
  4. Step 4: Simplify right side
    1,047.89x = 556,961.24
  5. Step 5: Solve for x
    x = 556,961.24/1,047.89
  6. Step 6: Final answer
    x = 531.51

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Double scale
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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.