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Finding the Fourth Proportional to 955.16, 1,430.30 and 874.97

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Solution

The fourth proportional to 955.16, 1,430.30 and 874.97 is: 1,310.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    955.16 : 1,430.30 = 874.97 : x
  2. Step 2: Convert to fraction form
    955.16/1,430.30 = 874.97/x
  3. Step 3: Cross multiply
    955.16x = 1,430.30 × 874.97
  4. Step 4: Simplify right side
    955.16x = 1,251,458.06
  5. Step 5: Solve for x
    x = 1,251,458.06/955.16
  6. Step 6: Final answer
    x = 1,310.21

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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.