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Finding the Fourth Proportional to 640,588.71, 883,977.73 and 354,090.35

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Solution

The fourth proportional to 640,588.71, 883,977.73 and 354,090.35 is: 488,625.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,588.71 : 883,977.73 = 354,090.35 : x
  2. Step 2: Convert to fraction form
    640,588.71/883,977.73 = 354,090.35/x
  3. Step 3: Cross multiply
    640,588.71x = 883,977.73 × 354,090.35
  4. Step 4: Simplify right side
    640,588.71x = 313,007,978,502.79
  5. Step 5: Solve for x
    x = 313,007,978,502.79/640,588.71
  6. Step 6: Final answer
    x = 488,625.50

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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.