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Finding the Fourth Proportional to 867.91, 1,197.71 and 474.93

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Solution

The fourth proportional to 867.91, 1,197.71 and 474.93 is: 655.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    867.91 : 1,197.71 = 474.93 : x
  2. Step 2: Convert to fraction form
    867.91/1,197.71 = 474.93/x
  3. Step 3: Cross multiply
    867.91x = 1,197.71 × 474.93
  4. Step 4: Simplify right side
    867.91x = 568,829.15
  5. Step 5: Solve for x
    x = 568,829.15/867.91
  6. Step 6: Final answer
    x = 655.40

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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.