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Finding the Fourth Proportional to 6,288.80, 8,678.40 and 4,051.20

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Solution

The fourth proportional to 6,288.80, 8,678.40 and 4,051.20 is: 5,590.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,288.80 : 8,678.40 = 4,051.20 : x
  2. Step 2: Convert to fraction form
    6,288.80/8,678.40 = 4,051.20/x
  3. Step 3: Cross multiply
    6,288.80x = 8,678.40 × 4,051.20
  4. Step 4: Simplify right side
    6,288.80x = 35,157,934.08
  5. Step 5: Solve for x
    x = 35,157,934.08/6,288.80
  6. Step 6: Final answer
    x = 5,590.56

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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.