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Finding the Fourth Proportional to 691,400.88, 954,099 and 389,614.32

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Solution

The fourth proportional to 691,400.88, 954,099 and 389,614.32 is: 537,648.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,400.88 : 954,099 = 389,614.32 : x
  2. Step 2: Convert to fraction form
    691,400.88/954,099 = 389,614.32/x
  3. Step 3: Cross multiply
    691,400.88x = 954,099 × 389,614.32
  4. Step 4: Simplify right side
    691,400.88x = 371,730,633,097.68
  5. Step 5: Solve for x
    x = 371,730,633,097.68/691,400.88
  6. Step 6: Final answer
    x = 537,648.48

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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.