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Finding the Fourth Proportional to 1,348.48, 1,861.41 and 955.90

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Solution

The fourth proportional to 1,348.48, 1,861.41 and 955.90 is: 1,319.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,348.48 : 1,861.41 = 955.90 : x
  2. Step 2: Convert to fraction form
    1,348.48/1,861.41 = 955.90/x
  3. Step 3: Cross multiply
    1,348.48x = 1,861.41 × 955.90
  4. Step 4: Simplify right side
    1,348.48x = 1,779,321.82
  5. Step 5: Solve for x
    x = 1,779,321.82/1,348.48
  6. Step 6: Final answer
    x = 1,319.50

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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.