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Finding the Fourth Proportional to 640,551.28, 883,922.34 and 354,054.28

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Solution

The fourth proportional to 640,551.28, 883,922.34 and 354,054.28 is: 488,573.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,551.28 : 883,922.34 = 354,054.28 : x
  2. Step 2: Convert to fraction form
    640,551.28/883,922.34 = 354,054.28/x
  3. Step 3: Cross multiply
    640,551.28x = 883,922.34 × 354,054.28
  4. Step 4: Simplify right side
    640,551.28x = 312,956,487,664.62
  5. Step 5: Solve for x
    x = 312,956,487,664.62/640,551.28
  6. Step 6: Final answer
    x = 488,573.67

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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.