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Finding the Fourth Proportional to 268,556.40, 370,578.78 and 155,358

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Solution

The fourth proportional to 268,556.40, 370,578.78 and 155,358 is: 214,377.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,556.40 : 370,578.78 = 155,358 : x
  2. Step 2: Convert to fraction form
    268,556.40/370,578.78 = 155,358/x
  3. Step 3: Cross multiply
    268,556.40x = 370,578.78 × 155,358
  4. Step 4: Simplify right side
    268,556.40x = 57,572,378,103.24
  5. Step 5: Solve for x
    x = 57,572,378,103.24/268,556.40
  6. Step 6: Final answer
    x = 214,377.23

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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.