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Finding the Fourth Proportional to 638,673, 958,009.50 and 358,212.12

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Solution

The fourth proportional to 638,673, 958,009.50 and 358,212.12 is: 537,318.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,673 : 958,009.50 = 358,212.12 : x
  2. Step 2: Convert to fraction form
    638,673/958,009.50 = 358,212.12/x
  3. Step 3: Cross multiply
    638,673x = 958,009.50 × 358,212.12
  4. Step 4: Simplify right side
    638,673x = 343,170,613,975.14
  5. Step 5: Solve for x
    x = 343,170,613,975.14/638,673
  6. Step 6: Final answer
    x = 537,318.18

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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.