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Finding the Fourth Proportional to 6,709,909.70, 10,064,864.55 and 1,661,220.20

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Solution

The fourth proportional to 6,709,909.70, 10,064,864.55 and 1,661,220.20 is: 2,491,830.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,709,909.70 : 10,064,864.55 = 1,661,220.20 : x
  2. Step 2: Convert to fraction form
    6,709,909.70/10,064,864.55 = 1,661,220.20/x
  3. Step 3: Cross multiply
    6,709,909.70x = 10,064,864.55 × 1,661,220.20
  4. Step 4: Simplify right side
    6,709,909.70x = 16,719,956,300,723.91
  5. Step 5: Solve for x
    x = 16,719,956,300,723.91/6,709,909.70
  6. Step 6: Final answer
    x = 2,491,830.30

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Similar ratio
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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.