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Finding the Fourth Proportional to 6,650.40, 9,966.60 and 4,303.20

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Solution

The fourth proportional to 6,650.40, 9,966.60 and 4,303.20 is: 6,448.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,650.40 : 9,966.60 = 4,303.20 : x
  2. Step 2: Convert to fraction form
    6,650.40/9,966.60 = 4,303.20/x
  3. Step 3: Cross multiply
    6,650.40x = 9,966.60 × 4,303.20
  4. Step 4: Simplify right side
    6,650.40x = 42,888,273.12
  5. Step 5: Solve for x
    x = 42,888,273.12/6,650.40
  6. Step 6: Final answer
    x = 6,448.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.