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Finding the Fourth Proportional to 640,027.64, 883,238.64 and 349,643.18

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Solution

The fourth proportional to 640,027.64, 883,238.64 and 349,643.18 is: 482,507.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,027.64 : 883,238.64 = 349,643.18 : x
  2. Step 2: Convert to fraction form
    640,027.64/883,238.64 = 349,643.18/x
  3. Step 3: Cross multiply
    640,027.64x = 883,238.64 × 349,643.18
  4. Step 4: Simplify right side
    640,027.64x = 308,818,366,788.48
  5. Step 5: Solve for x
    x = 308,818,366,788.48/640,027.64
  6. Step 6: Final answer
    x = 482,507.86

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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.