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Finding the Fourth Proportional to 287,682.39, 397,171.80 and 255,762.95

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Solution

The fourth proportional to 287,682.39, 397,171.80 and 255,762.95 is: 353,104.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,682.39 : 397,171.80 = 255,762.95 : x
  2. Step 2: Convert to fraction form
    287,682.39/397,171.80 = 255,762.95/x
  3. Step 3: Cross multiply
    287,682.39x = 397,171.80 × 255,762.95
  4. Step 4: Simplify right side
    287,682.39x = 101,581,829,238.95
  5. Step 5: Solve for x
    x = 101,581,829,238.95/287,682.39
  6. Step 6: Final answer
    x = 353,104.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.