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Finding the Fourth Proportional to 638,674.50, 958,011.75 and 358,213.62

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Solution

The fourth proportional to 638,674.50, 958,011.75 and 358,213.62 is: 537,320.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,674.50 : 958,011.75 = 358,213.62 : x
  2. Step 2: Convert to fraction form
    638,674.50/958,011.75 = 358,213.62/x
  3. Step 3: Cross multiply
    638,674.50x = 958,011.75 × 358,213.62
  4. Step 4: Simplify right side
    638,674.50x = 343,172,856,970.04
  5. Step 5: Solve for x
    x = 343,172,856,970.04/638,674.50
  6. Step 6: Final answer
    x = 537,320.43

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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.