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Finding the Fourth Proportional to 666,872.88, 920,306.88 and 408,699.94

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Solution

The fourth proportional to 666,872.88, 920,306.88 and 408,699.94 is: 564,019.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,872.88 : 920,306.88 = 408,699.94 : x
  2. Step 2: Convert to fraction form
    666,872.88/920,306.88 = 408,699.94/x
  3. Step 3: Cross multiply
    666,872.88x = 920,306.88 × 408,699.94
  4. Step 4: Simplify right side
    666,872.88x = 376,129,364,336.82
  5. Step 5: Solve for x
    x = 376,129,364,336.82/666,872.88
  6. Step 6: Final answer
    x = 564,019.58

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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.