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Finding the Fourth Proportional to 5,547.78, 7,655.93 and 3,189.78

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Solution

The fourth proportional to 5,547.78, 7,655.93 and 3,189.78 is: 4,401.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,547.78 : 7,655.93 = 3,189.78 : x
  2. Step 2: Convert to fraction form
    5,547.78/7,655.93 = 3,189.78/x
  3. Step 3: Cross multiply
    5,547.78x = 7,655.93 × 3,189.78
  4. Step 4: Simplify right side
    5,547.78x = 24,420,716.45
  5. Step 5: Solve for x
    x = 24,420,716.45/5,547.78
  6. Step 6: Final answer
    x = 4,401.89

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1.5x scale

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.