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Finding the Fourth Proportional to 291,472.43, 401,542.77 and 278,019.64

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Solution

The fourth proportional to 291,472.43, 401,542.77 and 278,019.64 is: 383,009.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,472.43 : 401,542.77 = 278,019.64 : x
  2. Step 2: Convert to fraction form
    291,472.43/401,542.77 = 278,019.64/x
  3. Step 3: Cross multiply
    291,472.43x = 401,542.77 × 278,019.64
  4. Step 4: Simplify right side
    291,472.43x = 111,636,776,340.64
  5. Step 5: Solve for x
    x = 111,636,776,340.64/291,472.43
  6. Step 6: Final answer
    x = 383,009.74

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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.