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Finding the Fourth Proportional to 798.08, 1,197.10 and 428.01

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Solution

The fourth proportional to 798.08, 1,197.10 and 428.01 is: 642.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    798.08 : 1,197.10 = 428.01 : x
  2. Step 2: Convert to fraction form
    798.08/1,197.10 = 428.01/x
  3. Step 3: Cross multiply
    798.08x = 1,197.10 × 428.01
  4. Step 4: Simplify right side
    798.08x = 512,373.55
  5. Step 5: Solve for x
    x = 512,373.55/798.08
  6. Step 6: Final answer
    x = 642.01

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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.