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Finding the Fourth Proportional to 971.90, 1,458.96 and 798.86

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Solution

The fourth proportional to 971.90, 1,458.96 and 798.86 is: 1,199.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    971.90 : 1,458.96 = 798.86 : x
  2. Step 2: Convert to fraction form
    971.90/1,458.96 = 798.86/x
  3. Step 3: Cross multiply
    971.90x = 1,458.96 × 798.86
  4. Step 4: Simplify right side
    971.90x = 1,165,509.93
  5. Step 5: Solve for x
    x = 1,165,509.93/971.90
  6. Step 6: Final answer
    x = 1,199.21

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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.