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Finding the Fourth Proportional to 281,778.83, 388,869.68 and 154,459.79

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Solution

The fourth proportional to 281,778.83, 388,869.68 and 154,459.79 is: 213,162.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,778.83 : 388,869.68 = 154,459.79 : x
  2. Step 2: Convert to fraction form
    281,778.83/388,869.68 = 154,459.79/x
  3. Step 3: Cross multiply
    281,778.83x = 388,869.68 × 154,459.79
  4. Step 4: Simplify right side
    281,778.83x = 60,064,727,551.97
  5. Step 5: Solve for x
    x = 60,064,727,551.97/281,778.83
  6. Step 6: Final answer
    x = 213,162.67

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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.