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Finding the Fourth Proportional to 256,513.80, 384,770.70 and 69,525.30

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Solution

The fourth proportional to 256,513.80, 384,770.70 and 69,525.30 is: 104,287.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,513.80 : 384,770.70 = 69,525.30 : x
  2. Step 2: Convert to fraction form
    256,513.80/384,770.70 = 69,525.30/x
  3. Step 3: Cross multiply
    256,513.80x = 384,770.70 × 69,525.30
  4. Step 4: Simplify right side
    256,513.80x = 26,751,298,348.71
  5. Step 5: Solve for x
    x = 26,751,298,348.71/256,513.80
  6. Step 6: Final answer
    x = 104,287.95

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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.