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Finding the Fourth Proportional to 640,804.59, 884,182.32 and 354,269.25

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Solution

The fourth proportional to 640,804.59, 884,182.32 and 354,269.25 is: 488,820.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,804.59 : 884,182.32 = 354,269.25 : x
  2. Step 2: Convert to fraction form
    640,804.59/884,182.32 = 354,269.25/x
  3. Step 3: Cross multiply
    640,804.59x = 884,182.32 × 354,269.25
  4. Step 4: Simplify right side
    640,804.59x = 313,238,607,369.66
  5. Step 5: Solve for x
    x = 313,238,607,369.66/640,804.59
  6. Step 6: Final answer
    x = 488,820.79

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1.5x scale

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.