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Finding the Fourth Proportional to 256,268.70, 384,402.12 and 69,280.20

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Solution

The fourth proportional to 256,268.70, 384,402.12 and 69,280.20 is: 103,920.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,268.70 : 384,402.12 = 69,280.20 : x
  2. Step 2: Convert to fraction form
    256,268.70/384,402.12 = 69,280.20/x
  3. Step 3: Cross multiply
    256,268.70x = 384,402.12 × 69,280.20
  4. Step 4: Simplify right side
    256,268.70x = 26,631,455,754.02
  5. Step 5: Solve for x
    x = 26,631,455,754.02/256,268.70
  6. Step 6: Final answer
    x = 103,920.05

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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.