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Finding the Fourth Proportional to 280,807.70, 421,211.55 and 168,833.30

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Solution

The fourth proportional to 280,807.70, 421,211.55 and 168,833.30 is: 253,249.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,807.70 : 421,211.55 = 168,833.30 : x
  2. Step 2: Convert to fraction form
    280,807.70/421,211.55 = 168,833.30/x
  3. Step 3: Cross multiply
    280,807.70x = 421,211.55 × 168,833.30
  4. Step 4: Simplify right side
    280,807.70x = 71,114,535,984.62
  5. Step 5: Solve for x
    x = 71,114,535,984.62/280,807.70
  6. Step 6: Final answer
    x = 253,249.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.