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Finding the Fourth Proportional to 684,988.21, 945,260.51 and 379,077.54

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Solution

The fourth proportional to 684,988.21, 945,260.51 and 379,077.54 is: 523,114.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    684,988.21 : 945,260.51 = 379,077.54 : x
  2. Step 2: Convert to fraction form
    684,988.21/945,260.51 = 379,077.54/x
  3. Step 3: Cross multiply
    684,988.21x = 945,260.51 × 379,077.54
  4. Step 4: Simplify right side
    684,988.21x = 358,327,028,789.95
  5. Step 5: Solve for x
    x = 358,327,028,789.95/684,988.21
  6. Step 6: Final answer
    x = 523,114.16

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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.