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Finding the Fourth Proportional to 638,005.70, 957,008.55 and 322,421.60

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Solution

The fourth proportional to 638,005.70, 957,008.55 and 322,421.60 is: 483,632.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,005.70 : 957,008.55 = 322,421.60 : x
  2. Step 2: Convert to fraction form
    638,005.70/957,008.55 = 322,421.60/x
  3. Step 3: Cross multiply
    638,005.70x = 957,008.55 × 322,421.60
  4. Step 4: Simplify right side
    638,005.70x = 308,560,227,904.68
  5. Step 5: Solve for x
    x = 308,560,227,904.68/638,005.70
  6. Step 6: Final answer
    x = 483,632.40

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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.