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Finding the Fourth Proportional to 4,981.78, 6,875.31 and 2,885.50

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Solution

The fourth proportional to 4,981.78, 6,875.31 and 2,885.50 is: 3,982.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,981.78 : 6,875.31 = 2,885.50 : x
  2. Step 2: Convert to fraction form
    4,981.78/6,875.31 = 2,885.50/x
  3. Step 3: Cross multiply
    4,981.78x = 6,875.31 × 2,885.50
  4. Step 4: Simplify right side
    4,981.78x = 19,838,707.01
  5. Step 5: Solve for x
    x = 19,838,707.01/4,981.78
  6. Step 6: Final answer
    x = 3,982.25

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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.