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Finding the Fourth Proportional to 798.49, 1,197.83 and 387.60

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Solution

The fourth proportional to 798.49, 1,197.83 and 387.60 is: 581.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    798.49 : 1,197.83 = 387.60 : x
  2. Step 2: Convert to fraction form
    798.49/1,197.83 = 387.60/x
  3. Step 3: Cross multiply
    798.49x = 1,197.83 × 387.60
  4. Step 4: Simplify right side
    798.49x = 464,278.91
  5. Step 5: Solve for x
    x = 464,278.91/798.49
  6. Step 6: Final answer
    x = 581.45

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Double scale
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1.5x scale

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.