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Finding the Fourth Proportional to 256,486.40, 384,729.62 and 69,497.90

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Solution

The fourth proportional to 256,486.40, 384,729.62 and 69,497.90 is: 104,246.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,486.40 : 384,729.62 = 69,497.90 : x
  2. Step 2: Convert to fraction form
    256,486.40/384,729.62 = 69,497.90/x
  3. Step 3: Cross multiply
    256,486.40x = 384,729.62 × 69,497.90
  4. Step 4: Simplify right side
    256,486.40x = 26,737,898,386.66
  5. Step 5: Solve for x
    x = 26,737,898,386.66/256,486.40
  6. Step 6: Final answer
    x = 104,246.85

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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.