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Finding the Fourth Proportional to 666,724, 920,079.12 and 364,918

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Solution

The fourth proportional to 666,724, 920,079.12 and 364,918 is: 503,586.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,724 : 920,079.12 = 364,918 : x
  2. Step 2: Convert to fraction form
    666,724/920,079.12 = 364,918/x
  3. Step 3: Cross multiply
    666,724x = 920,079.12 × 364,918
  4. Step 4: Simplify right side
    666,724x = 335,753,432,312.16
  5. Step 5: Solve for x
    x = 335,753,432,312.16/666,724
  6. Step 6: Final answer
    x = 503,586.84

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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.