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Finding the Fourth Proportional to 281,392.68, 388,321.83 and 154,068.24

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Solution

The fourth proportional to 281,392.68, 388,321.83 and 154,068.24 is: 212,614.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,392.68 : 388,321.83 = 154,068.24 : x
  2. Step 2: Convert to fraction form
    281,392.68/388,321.83 = 154,068.24/x
  3. Step 3: Cross multiply
    281,392.68x = 388,321.83 × 154,068.24
  4. Step 4: Simplify right side
    281,392.68x = 59,828,060,901.68
  5. Step 5: Solve for x
    x = 59,828,060,901.68/281,392.68
  6. Step 6: Final answer
    x = 212,614.13

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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.