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Finding the Fourth Proportional to 4,799.78, 7,199.10 and 1,290.06

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Solution

The fourth proportional to 4,799.78, 7,199.10 and 1,290.06 is: 1,934.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,799.78 : 7,199.10 = 1,290.06 : x
  2. Step 2: Convert to fraction form
    4,799.78/7,199.10 = 1,290.06/x
  3. Step 3: Cross multiply
    4,799.78x = 7,199.10 × 1,290.06
  4. Step 4: Simplify right side
    4,799.78x = 9,287,270.95
  5. Step 5: Solve for x
    x = 9,287,270.95/4,799.78
  6. Step 6: Final answer
    x = 1,934.94

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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.