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Finding the Fourth Proportional to 674,239.35, 930,478.58 and 387,759.67

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Solution

The fourth proportional to 674,239.35, 930,478.58 and 387,759.67 is: 535,124.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    674,239.35 : 930,478.58 = 387,759.67 : x
  2. Step 2: Convert to fraction form
    674,239.35/930,478.58 = 387,759.67/x
  3. Step 3: Cross multiply
    674,239.35x = 930,478.58 × 387,759.67
  4. Step 4: Simplify right side
    674,239.35x = 360,802,067,122.87
  5. Step 5: Solve for x
    x = 360,802,067,122.87/674,239.35
  6. Step 6: Final answer
    x = 535,124.61

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.