Home / 638,005.20-957,007.80-322,421.10

Finding the Fourth Proportional to 638,005.20, 957,007.80 and 322,421.10

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Solution

The fourth proportional to 638,005.20, 957,007.80 and 322,421.10 is: 483,631.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,005.20 : 957,007.80 = 322,421.10 : x
  2. Step 2: Convert to fraction form
    638,005.20/957,007.80 = 322,421.10/x
  3. Step 3: Cross multiply
    638,005.20x = 957,007.80 × 322,421.10
  4. Step 4: Simplify right side
    638,005.20x = 308,559,507,584.58
  5. Step 5: Solve for x
    x = 308,559,507,584.58/638,005.20
  6. Step 6: Final answer
    x = 483,631.65

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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.