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Finding the Fourth Proportional to 640,337.84, 959,743.32 and 298,322.48

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Solution

The fourth proportional to 640,337.84, 959,743.32 and 298,322.48 is: 447,128.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,337.84 : 959,743.32 = 298,322.48 : x
  2. Step 2: Convert to fraction form
    640,337.84/959,743.32 = 298,322.48/x
  3. Step 3: Cross multiply
    640,337.84x = 959,743.32 × 298,322.48
  4. Step 4: Simplify right side
    640,337.84x = 286,313,007,385.83
  5. Step 5: Solve for x
    x = 286,313,007,385.83/640,337.84
  6. Step 6: Final answer
    x = 447,128.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.