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Finding the Fourth Proportional to 4,875.76, 6,728.52 and 2,779.84

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Solution

The fourth proportional to 4,875.76, 6,728.52 and 2,779.84 is: 3,836.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,875.76 : 6,728.52 = 2,779.84 : x
  2. Step 2: Convert to fraction form
    4,875.76/6,728.52 = 2,779.84/x
  3. Step 3: Cross multiply
    4,875.76x = 6,728.52 × 2,779.84
  4. Step 4: Simplify right side
    4,875.76x = 18,704,209.04
  5. Step 5: Solve for x
    x = 18,704,209.04/4,875.76
  6. Step 6: Final answer
    x = 3,836.16

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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.