Home / 687,837.78-949,219.92-381,909.78

Finding the Fourth Proportional to 687,837.78, 949,219.92 and 381,909.78

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Solution

The fourth proportional to 687,837.78, 949,219.92 and 381,909.78 is: 527,037.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,837.78 : 949,219.92 = 381,909.78 : x
  2. Step 2: Convert to fraction form
    687,837.78/949,219.92 = 381,909.78/x
  3. Step 3: Cross multiply
    687,837.78x = 949,219.92 × 381,909.78
  4. Step 4: Simplify right side
    687,837.78x = 362,516,370,818.82
  5. Step 5: Solve for x
    x = 362,516,370,818.82/687,837.78
  6. Step 6: Final answer
    x = 527,037.60

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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.