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Finding the Fourth Proportional to 666,878, 920,292.36 and 365,072.72

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Solution

The fourth proportional to 666,878, 920,292.36 and 365,072.72 is: 503,800.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,878 : 920,292.36 = 365,072.72 : x
  2. Step 2: Convert to fraction form
    666,878/920,292.36 = 365,072.72/x
  3. Step 3: Cross multiply
    666,878x = 920,292.36 × 365,072.72
  4. Step 4: Simplify right side
    666,878x = 335,973,635,060.42
  5. Step 5: Solve for x
    x = 335,973,635,060.42/666,878
  6. Step 6: Final answer
    x = 503,800.75

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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.