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Finding the Fourth Proportional to 281,399.76, 388,331.64 and 154,075.68

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Solution

The fourth proportional to 281,399.76, 388,331.64 and 154,075.68 is: 212,624.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,399.76 : 388,331.64 = 154,075.68 : x
  2. Step 2: Convert to fraction form
    281,399.76/388,331.64 = 154,075.68/x
  3. Step 3: Cross multiply
    281,399.76x = 388,331.64 × 154,075.68
  4. Step 4: Simplify right side
    281,399.76x = 59,832,461,498.52
  5. Step 5: Solve for x
    x = 59,832,461,498.52/281,399.76
  6. Step 6: Final answer
    x = 212,624.42

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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.