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Finding the Fourth Proportional to 281,753.16, 388,817.04 and 154,428.45

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Solution

The fourth proportional to 281,753.16, 388,817.04 and 154,428.45 is: 213,109.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,753.16 : 388,817.04 = 154,428.45 : x
  2. Step 2: Convert to fraction form
    281,753.16/388,817.04 = 154,428.45/x
  3. Step 3: Cross multiply
    281,753.16x = 388,817.04 × 154,428.45
  4. Step 4: Simplify right side
    281,753.16x = 60,044,412,820.79
  5. Step 5: Solve for x
    x = 60,044,412,820.79/281,753.16
  6. Step 6: Final answer
    x = 213,109.99

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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.