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Finding the Fourth Proportional to 687,879.64, 949,260.58 and 381,940.22

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Solution

The fourth proportional to 687,879.64, 949,260.58 and 381,940.22 is: 527,070.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,879.64 : 949,260.58 = 381,940.22 : x
  2. Step 2: Convert to fraction form
    687,879.64/949,260.58 = 381,940.22/x
  3. Step 3: Cross multiply
    687,879.64x = 949,260.58 × 381,940.22
  4. Step 4: Simplify right side
    687,879.64x = 362,560,794,762.53
  5. Step 5: Solve for x
    x = 362,560,794,762.53/687,879.64
  6. Step 6: Final answer
    x = 527,070.11

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1.5x scale

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.