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Finding the Fourth Proportional to 684,988.71, 945,261.20 and 379,078.04

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Solution

The fourth proportional to 684,988.71, 945,261.20 and 379,078.04 is: 523,114.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    684,988.71 : 945,261.20 = 379,078.04 : x
  2. Step 2: Convert to fraction form
    684,988.71/945,261.20 = 379,078.04/x
  3. Step 3: Cross multiply
    684,988.71x = 945,261.20 × 379,078.04
  4. Step 4: Simplify right side
    684,988.71x = 358,327,759,205.44
  5. Step 5: Solve for x
    x = 358,327,759,205.44/684,988.71
  6. Step 6: Final answer
    x = 523,114.84

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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.