Home / 645,335.64-890,584.82-354,959.48

Finding the Fourth Proportional to 645,335.64, 890,584.82 and 354,959.48

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Solution

The fourth proportional to 645,335.64, 890,584.82 and 354,959.48 is: 489,855.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,335.64 : 890,584.82 = 354,959.48 : x
  2. Step 2: Convert to fraction form
    645,335.64/890,584.82 = 354,959.48/x
  3. Step 3: Cross multiply
    645,335.64x = 890,584.82 × 354,959.48
  4. Step 4: Simplify right side
    645,335.64x = 316,121,524,603.09
  5. Step 5: Solve for x
    x = 316,121,524,603.09/645,335.64
  6. Step 6: Final answer
    x = 489,855.98

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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.