Home / 645,335.39-890,584.48-354,959.23

Finding the Fourth Proportional to 645,335.39, 890,584.48 and 354,959.23

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Solution

The fourth proportional to 645,335.39, 890,584.48 and 354,959.23 is: 489,855.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,335.39 : 890,584.48 = 354,959.23 : x
  2. Step 2: Convert to fraction form
    645,335.39/890,584.48 = 354,959.23/x
  3. Step 3: Cross multiply
    645,335.39x = 890,584.48 × 354,959.23
  4. Step 4: Simplify right side
    645,335.39x = 316,121,179,495.95
  5. Step 5: Solve for x
    x = 316,121,179,495.95/645,335.39
  6. Step 6: Final answer
    x = 489,855.64

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Double scale
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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.