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Finding the Fourth Proportional to 665,701.84, 918,674.94 and 379,217.80

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Solution

The fourth proportional to 665,701.84, 918,674.94 and 379,217.80 is: 523,324.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,701.84 : 918,674.94 = 379,217.80 : x
  2. Step 2: Convert to fraction form
    665,701.84/918,674.94 = 379,217.80/x
  3. Step 3: Cross multiply
    665,701.84x = 918,674.94 × 379,217.80
  4. Step 4: Simplify right side
    665,701.84x = 348,377,889,661.93
  5. Step 5: Solve for x
    x = 348,377,889,661.93/665,701.84
  6. Step 6: Final answer
    x = 523,324.21

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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.