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Finding the Fourth Proportional to 6,362.78, 8,780.80 and 3,530.20

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Solution

The fourth proportional to 6,362.78, 8,780.80 and 3,530.20 is: 4,871.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,362.78 : 8,780.80 = 3,530.20 : x
  2. Step 2: Convert to fraction form
    6,362.78/8,780.80 = 3,530.20/x
  3. Step 3: Cross multiply
    6,362.78x = 8,780.80 × 3,530.20
  4. Step 4: Simplify right side
    6,362.78x = 30,997,980.16
  5. Step 5: Solve for x
    x = 30,997,980.16/6,362.78
  6. Step 6: Final answer
    x = 4,871.77

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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.