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Finding the Fourth Proportional to 640,993.64, 884,554.98 and 354,506.60

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Solution

The fourth proportional to 640,993.64, 884,554.98 and 354,506.60 is: 489,210.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,993.64 : 884,554.98 = 354,506.60 : x
  2. Step 2: Convert to fraction form
    640,993.64/884,554.98 = 354,506.60/x
  3. Step 3: Cross multiply
    640,993.64x = 884,554.98 × 354,506.60
  4. Step 4: Simplify right side
    640,993.64x = 313,580,578,472.87
  5. Step 5: Solve for x
    x = 313,580,578,472.87/640,993.64
  6. Step 6: Final answer
    x = 489,210.12

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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.