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Finding the Fourth Proportional to 1,197.98, 1,798.86 and 713.20

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Solution

The fourth proportional to 1,197.98, 1,798.86 and 713.20 is: 1,070.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,197.98 : 1,798.86 = 713.20 : x
  2. Step 2: Convert to fraction form
    1,197.98/1,798.86 = 713.20/x
  3. Step 3: Cross multiply
    1,197.98x = 1,798.86 × 713.20
  4. Step 4: Simplify right side
    1,197.98x = 1,282,946.95
  5. Step 5: Solve for x
    x = 1,282,946.95/1,197.98
  6. Step 6: Final answer
    x = 1,070.93

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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.