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Finding the Fourth Proportional to 5,290.48, 7,936.12 and 1,780.50

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Solution

The fourth proportional to 5,290.48, 7,936.12 and 1,780.50 is: 2,670.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,290.48 : 7,936.12 = 1,780.50 : x
  2. Step 2: Convert to fraction form
    5,290.48/7,936.12 = 1,780.50/x
  3. Step 3: Cross multiply
    5,290.48x = 7,936.12 × 1,780.50
  4. Step 4: Simplify right side
    5,290.48x = 14,130,249.01
  5. Step 5: Solve for x
    x = 14,130,249.01/5,290.48
  6. Step 6: Final answer
    x = 2,670.88

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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.