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Finding the Fourth Proportional to 286,712.39, 395,673.32 and 157,660.70

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Solution

The fourth proportional to 286,712.39, 395,673.32 and 157,660.70 is: 217,577.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,712.39 : 395,673.32 = 157,660.70 : x
  2. Step 2: Convert to fraction form
    286,712.39/395,673.32 = 157,660.70/x
  3. Step 3: Cross multiply
    286,712.39x = 395,673.32 × 157,660.70
  4. Step 4: Simplify right side
    286,712.39x = 62,382,131,018.31
  5. Step 5: Solve for x
    x = 62,382,131,018.31/286,712.39
  6. Step 6: Final answer
    x = 217,577.38

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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.