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Finding the Fourth Proportional to 638,007.70, 957,011.55 and 322,423.60

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Solution

The fourth proportional to 638,007.70, 957,011.55 and 322,423.60 is: 483,635.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,007.70 : 957,011.55 = 322,423.60 : x
  2. Step 2: Convert to fraction form
    638,007.70/957,011.55 = 322,423.60/x
  3. Step 3: Cross multiply
    638,007.70x = 957,011.55 × 322,423.60
  4. Step 4: Simplify right side
    638,007.70x = 308,563,109,192.58
  5. Step 5: Solve for x
    x = 308,563,109,192.58/638,007.70
  6. Step 6: Final answer
    x = 483,635.40

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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.