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Finding the Fourth Proportional to 256,676.62, 385,012.48 and 69,688.12

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Solution

The fourth proportional to 256,676.62, 385,012.48 and 69,688.12 is: 104,531.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,676.62 : 385,012.48 = 69,688.12 : x
  2. Step 2: Convert to fraction form
    256,676.62/385,012.48 = 69,688.12/x
  3. Step 3: Cross multiply
    256,676.62x = 385,012.48 × 69,688.12
  4. Step 4: Simplify right side
    256,676.62x = 26,830,795,907.74
  5. Step 5: Solve for x
    x = 26,830,795,907.74/256,676.62
  6. Step 6: Final answer
    x = 104,531.51

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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.