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Finding the Fourth Proportional to 395,011.67, 545,383.26 and 259,276.32

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Solution

The fourth proportional to 395,011.67, 545,383.26 and 259,276.32 is: 357,976.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,011.67 : 545,383.26 = 259,276.32 : x
  2. Step 2: Convert to fraction form
    395,011.67/545,383.26 = 259,276.32/x
  3. Step 3: Cross multiply
    395,011.67x = 545,383.26 × 259,276.32
  4. Step 4: Simplify right side
    395,011.67x = 141,404,964,642.40
  5. Step 5: Solve for x
    x = 141,404,964,642.40/395,011.67
  6. Step 6: Final answer
    x = 357,976.68

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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.