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Finding the Fourth Proportional to 640,559, 883,964.94 and 354,065.24

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Solution

The fourth proportional to 640,559, 883,964.94 and 354,065.24 is: 488,606.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,559 : 883,964.94 = 354,065.24 : x
  2. Step 2: Convert to fraction form
    640,559/883,964.94 = 354,065.24/x
  3. Step 3: Cross multiply
    640,559x = 883,964.94 × 354,065.24
  4. Step 4: Simplify right side
    640,559x = 312,981,258,632.69
  5. Step 5: Solve for x
    x = 312,981,258,632.69/640,559
  6. Step 6: Final answer
    x = 488,606.45

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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.