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Finding the Fourth Proportional to 256,678.62, 385,015.48 and 69,690.12

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Solution

The fourth proportional to 256,678.62, 385,015.48 and 69,690.12 is: 104,534.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,678.62 : 385,015.48 = 69,690.12 : x
  2. Step 2: Convert to fraction form
    256,678.62/385,015.48 = 69,690.12/x
  3. Step 3: Cross multiply
    256,678.62x = 385,015.48 × 69,690.12
  4. Step 4: Simplify right side
    256,678.62x = 26,831,775,003.06
  5. Step 5: Solve for x
    x = 26,831,775,003.06/256,678.62
  6. Step 6: Final answer
    x = 104,534.51

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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.