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Finding the Fourth Proportional to 660,672.10, 911,872.65 and 434,338.66

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Solution

The fourth proportional to 660,672.10, 911,872.65 and 434,338.66 is: 599,482.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,672.10 : 911,872.65 = 434,338.66 : x
  2. Step 2: Convert to fraction form
    660,672.10/911,872.65 = 434,338.66/x
  3. Step 3: Cross multiply
    660,672.10x = 911,872.65 × 434,338.66
  4. Step 4: Simplify right side
    660,672.10x = 396,061,544,891.65
  5. Step 5: Solve for x
    x = 396,061,544,891.65/660,672.10
  6. Step 6: Final answer
    x = 599,482.78

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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.