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Finding the Fourth Proportional to 885,798.80, 1,328,698.20 and 324,760.40

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Solution

The fourth proportional to 885,798.80, 1,328,698.20 and 324,760.40 is: 487,140.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    885,798.80 : 1,328,698.20 = 324,760.40 : x
  2. Step 2: Convert to fraction form
    885,798.80/1,328,698.20 = 324,760.40/x
  3. Step 3: Cross multiply
    885,798.80x = 1,328,698.20 × 324,760.40
  4. Step 4: Simplify right side
    885,798.80x = 431,508,558,911.28
  5. Step 5: Solve for x
    x = 431,508,558,911.28/885,798.80
  6. Step 6: Final answer
    x = 487,140.60

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Double scale
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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.