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Finding the Fourth Proportional to 640,548.60, 883,919.07 and 354,051.60

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Solution

The fourth proportional to 640,548.60, 883,919.07 and 354,051.60 is: 488,570.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,548.60 : 883,919.07 = 354,051.60 : x
  2. Step 2: Convert to fraction form
    640,548.60/883,919.07 = 354,051.60/x
  3. Step 3: Cross multiply
    640,548.60x = 883,919.07 × 354,051.60
  4. Step 4: Simplify right side
    640,548.60x = 312,952,961,004.01
  5. Step 5: Solve for x
    x = 312,952,961,004.01/640,548.60
  6. Step 6: Final answer
    x = 488,570.21

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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.