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Finding the Fourth Proportional to 4,971.78, 6,860.30 and 2,875.50

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Solution

The fourth proportional to 4,971.78, 6,860.30 and 2,875.50 is: 3,967.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,971.78 : 6,860.30 = 2,875.50 : x
  2. Step 2: Convert to fraction form
    4,971.78/6,860.30 = 2,875.50/x
  3. Step 3: Cross multiply
    4,971.78x = 6,860.30 × 2,875.50
  4. Step 4: Simplify right side
    4,971.78x = 19,726,778.27
  5. Step 5: Solve for x
    x = 19,726,778.27/4,971.78
  6. Step 6: Final answer
    x = 3,967.75

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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.