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Finding the Fourth Proportional to 638,159.40, 957,239.10 and 323,231.40

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Solution

The fourth proportional to 638,159.40, 957,239.10 and 323,231.40 is: 484,847.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,159.40 : 957,239.10 = 323,231.40 : x
  2. Step 2: Convert to fraction form
    638,159.40/957,239.10 = 323,231.40/x
  3. Step 3: Cross multiply
    638,159.40x = 957,239.10 × 323,231.40
  4. Step 4: Simplify right side
    638,159.40x = 309,409,734,427.74
  5. Step 5: Solve for x
    x = 309,409,734,427.74/638,159.40
  6. Step 6: Final answer
    x = 484,847.10

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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.