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Finding the Fourth Proportional to 281,320.86, 388,223.83 and 154,008.30

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Solution

The fourth proportional to 281,320.86, 388,223.83 and 154,008.30 is: 212,532.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,320.86 : 388,223.83 = 154,008.30 : x
  2. Step 2: Convert to fraction form
    281,320.86/388,223.83 = 154,008.30/x
  3. Step 3: Cross multiply
    281,320.86x = 388,223.83 × 154,008.30
  4. Step 4: Simplify right side
    281,320.86x = 59,789,689,751.65
  5. Step 5: Solve for x
    x = 59,789,689,751.65/281,320.86
  6. Step 6: Final answer
    x = 212,532.02

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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.