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Finding the Fourth Proportional to 640,684.62, 884,065.59 and 354,210.30

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Solution

The fourth proportional to 640,684.62, 884,065.59 and 354,210.30 is: 488,766.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,684.62 : 884,065.59 = 354,210.30 : x
  2. Step 2: Convert to fraction form
    640,684.62/884,065.59 = 354,210.30/x
  3. Step 3: Cross multiply
    640,684.62x = 884,065.59 × 354,210.30
  4. Step 4: Simplify right side
    640,684.62x = 313,145,137,853.58
  5. Step 5: Solve for x
    x = 313,145,137,853.58/640,684.62
  6. Step 6: Final answer
    x = 488,766.44

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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.