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Finding the Fourth Proportional to 256,812.84, 385,218.18 and 69,823.80

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Solution

The fourth proportional to 256,812.84, 385,218.18 and 69,823.80 is: 104,735.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,812.84 : 385,218.18 = 69,823.80 : x
  2. Step 2: Convert to fraction form
    256,812.84/385,218.18 = 69,823.80/x
  3. Step 3: Cross multiply
    256,812.84x = 385,218.18 × 69,823.80
  4. Step 4: Simplify right side
    256,812.84x = 26,897,397,156.68
  5. Step 5: Solve for x
    x = 26,897,397,156.68/256,812.84
  6. Step 6: Final answer
    x = 104,735.41

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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.