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Finding the Fourth Proportional to 280,511.40, 421,803.90 and 234,892.20

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Solution

The fourth proportional to 280,511.40, 421,803.90 and 234,892.20 is: 353,206.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,511.40 : 421,803.90 = 234,892.20 : x
  2. Step 2: Convert to fraction form
    280,511.40/421,803.90 = 234,892.20/x
  3. Step 3: Cross multiply
    280,511.40x = 421,803.90 × 234,892.20
  4. Step 4: Simplify right side
    280,511.40x = 99,078,446,039.58
  5. Step 5: Solve for x
    x = 99,078,446,039.58/280,511.40
  6. Step 6: Final answer
    x = 353,206.49

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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.