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Finding the Fourth Proportional to 640,980.81, 884,538.36 and 354,494.88

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Solution

The fourth proportional to 640,980.81, 884,538.36 and 354,494.88 is: 489,194.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,980.81 : 884,538.36 = 354,494.88 : x
  2. Step 2: Convert to fraction form
    640,980.81/884,538.36 = 354,494.88/x
  3. Step 3: Cross multiply
    640,980.81x = 884,538.36 × 354,494.88
  4. Step 4: Simplify right side
    640,980.81x = 313,564,319,783.60
  5. Step 5: Solve for x
    x = 313,564,319,783.60/640,980.81
  6. Step 6: Final answer
    x = 489,194.55

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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.