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Finding the Fourth Proportional to 283,455.66, 391,160.75 and 154,391.21

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Solution

The fourth proportional to 283,455.66, 391,160.75 and 154,391.21 is: 213,055.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,455.66 : 391,160.75 = 154,391.21 : x
  2. Step 2: Convert to fraction form
    283,455.66/391,160.75 = 154,391.21/x
  3. Step 3: Cross multiply
    283,455.66x = 391,160.75 × 154,391.21
  4. Step 4: Simplify right side
    283,455.66x = 60,391,778,769.25
  5. Step 5: Solve for x
    x = 60,391,778,769.25/283,455.66
  6. Step 6: Final answer
    x = 213,055.47

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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.