Home / 643,204.17-887,651.39-356,707.17

Finding the Fourth Proportional to 643,204.17, 887,651.39 and 356,707.17

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Solution

The fourth proportional to 643,204.17, 887,651.39 and 356,707.17 is: 492,272.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,204.17 : 887,651.39 = 356,707.17 : x
  2. Step 2: Convert to fraction form
    643,204.17/887,651.39 = 356,707.17/x
  3. Step 3: Cross multiply
    643,204.17x = 887,651.39 × 356,707.17
  4. Step 4: Simplify right side
    643,204.17x = 316,631,615,273.47
  5. Step 5: Solve for x
    x = 316,631,615,273.47/643,204.17
  6. Step 6: Final answer
    x = 492,272.33

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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.