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Finding the Fourth Proportional to 285,612.39, 394,145.07 and 158,296.17

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Solution

The fourth proportional to 285,612.39, 394,145.07 and 158,296.17 is: 218,448.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,612.39 : 394,145.07 = 158,296.17 : x
  2. Step 2: Convert to fraction form
    285,612.39/394,145.07 = 158,296.17/x
  3. Step 3: Cross multiply
    285,612.39x = 394,145.07 × 158,296.17
  4. Step 4: Simplify right side
    285,612.39x = 62,391,655,005.38
  5. Step 5: Solve for x
    x = 62,391,655,005.38/285,612.39
  6. Step 6: Final answer
    x = 218,448.70

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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.