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Finding the Fourth Proportional to 6,643,513.60, 9,965,270.40 and 4,250,060.80

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Solution

The fourth proportional to 6,643,513.60, 9,965,270.40 and 4,250,060.80 is: 6,375,091.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,643,513.60 : 9,965,270.40 = 4,250,060.80 : x
  2. Step 2: Convert to fraction form
    6,643,513.60/9,965,270.40 = 4,250,060.80/x
  3. Step 3: Cross multiply
    6,643,513.60x = 9,965,270.40 × 4,250,060.80
  4. Step 4: Simplify right side
    6,643,513.60x = 42,353,005,088,440.32
  5. Step 5: Solve for x
    x = 42,353,005,088,440.32/6,643,513.60
  6. Step 6: Final answer
    x = 6,375,091.20

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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.