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Finding the Fourth Proportional to 823,967, 1,136,978.76 and 479,878.10

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Solution

The fourth proportional to 823,967, 1,136,978.76 and 479,878.10 is: 662,176.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    823,967 : 1,136,978.76 = 479,878.10 : x
  2. Step 2: Convert to fraction form
    823,967/1,136,978.76 = 479,878.10/x
  3. Step 3: Cross multiply
    823,967x = 1,136,978.76 × 479,878.10
  4. Step 4: Simplify right side
    823,967x = 545,611,207,089.16
  5. Step 5: Solve for x
    x = 545,611,207,089.16/823,967
  6. Step 6: Final answer
    x = 662,176.04

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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.