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Finding the Fourth Proportional to 666,718, 920,070.84 and 364,912

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Solution

The fourth proportional to 666,718, 920,070.84 and 364,912 is: 503,578.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,718 : 920,070.84 = 364,912 : x
  2. Step 2: Convert to fraction form
    666,718/920,070.84 = 364,912/x
  3. Step 3: Cross multiply
    666,718x = 920,070.84 × 364,912
  4. Step 4: Simplify right side
    666,718x = 335,744,890,366.08
  5. Step 5: Solve for x
    x = 335,744,890,366.08/666,718
  6. Step 6: Final answer
    x = 503,578.56

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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.