Home / 686,565.87-947,517.04-380,738.17

Finding the Fourth Proportional to 686,565.87, 947,517.04 and 380,738.17

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Solution

The fourth proportional to 686,565.87, 947,517.04 and 380,738.17 is: 525,449.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,565.87 : 947,517.04 = 380,738.17 : x
  2. Step 2: Convert to fraction form
    686,565.87/947,517.04 = 380,738.17/x
  3. Step 3: Cross multiply
    686,565.87x = 947,517.04 × 380,738.17
  4. Step 4: Simplify right side
    686,565.87x = 360,755,905,513.74
  5. Step 5: Solve for x
    x = 360,755,905,513.74/686,565.87
  6. Step 6: Final answer
    x = 525,449.81

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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.