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Finding the Fourth Proportional to 686,568.12, 947,520.15 and 380,740.43

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Solution

The fourth proportional to 686,568.12, 947,520.15 and 380,740.43 is: 525,452.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,568.12 : 947,520.15 = 380,740.43 : x
  2. Step 2: Convert to fraction form
    686,568.12/947,520.15 = 380,740.43/x
  3. Step 3: Cross multiply
    686,568.12x = 947,520.15 × 380,740.43
  4. Step 4: Simplify right side
    686,568.12x = 360,759,229,344.67
  5. Step 5: Solve for x
    x = 360,759,229,344.67/686,568.12
  6. Step 6: Final answer
    x = 525,452.93

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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.