Home / 687,823.76-949,200.36-381,911.12

Finding the Fourth Proportional to 687,823.76, 949,200.36 and 381,911.12

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Solution

The fourth proportional to 687,823.76, 949,200.36 and 381,911.12 is: 527,039.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,823.76 : 949,200.36 = 381,911.12 : x
  2. Step 2: Convert to fraction form
    687,823.76/949,200.36 = 381,911.12/x
  3. Step 3: Cross multiply
    687,823.76x = 949,200.36 × 381,911.12
  4. Step 4: Simplify right side
    687,823.76x = 362,510,172,592.00
  5. Step 5: Solve for x
    x = 362,510,172,592.00/687,823.76
  6. Step 6: Final answer
    x = 527,039.33

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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.