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Finding the Fourth Proportional to 681,434.25, 940,398.71 and 379,647.69

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Solution

The fourth proportional to 681,434.25, 940,398.71 and 379,647.69 is: 523,924.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,434.25 : 940,398.71 = 379,647.69 : x
  2. Step 2: Convert to fraction form
    681,434.25/940,398.71 = 379,647.69/x
  3. Step 3: Cross multiply
    681,434.25x = 940,398.71 × 379,647.69
  4. Step 4: Simplify right side
    681,434.25x = 357,020,196,032.24
  5. Step 5: Solve for x
    x = 357,020,196,032.24/681,434.25
  6. Step 6: Final answer
    x = 523,924.64

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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.