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Finding the Fourth Proportional to 280,377.84, 386,907.90 and 159,507.72

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Solution

The fourth proportional to 280,377.84, 386,907.90 and 159,507.72 is: 220,112.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,377.84 : 386,907.90 = 159,507.72 : x
  2. Step 2: Convert to fraction form
    280,377.84/386,907.90 = 159,507.72/x
  3. Step 3: Cross multiply
    280,377.84x = 386,907.90 × 159,507.72
  4. Step 4: Simplify right side
    280,377.84x = 61,714,796,978.99
  5. Step 5: Solve for x
    x = 61,714,796,978.99/280,377.84
  6. Step 6: Final answer
    x = 220,112.96

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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.