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Finding the Fourth Proportional to 666,873.88, 920,308.26 and 408,700.94

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Solution

The fourth proportional to 666,873.88, 920,308.26 and 408,700.94 is: 564,020.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,873.88 : 920,308.26 = 408,700.94 : x
  2. Step 2: Convert to fraction form
    666,873.88/920,308.26 = 408,700.94/x
  3. Step 3: Cross multiply
    666,873.88x = 920,308.26 × 408,700.94
  4. Step 4: Simplify right side
    666,873.88x = 376,130,850,951.76
  5. Step 5: Solve for x
    x = 376,130,850,951.76/666,873.88
  6. Step 6: Final answer
    x = 564,020.97

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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.