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Finding the Fourth Proportional to 640,441.92, 961,264.80 and 325,125.12

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Solution

The fourth proportional to 640,441.92, 961,264.80 and 325,125.12 is: 487,993.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,441.92 : 961,264.80 = 325,125.12 : x
  2. Step 2: Convert to fraction form
    640,441.92/961,264.80 = 325,125.12/x
  3. Step 3: Cross multiply
    640,441.92x = 961,264.80 × 325,125.12
  4. Step 4: Simplify right side
    640,441.92x = 312,531,333,451.78
  5. Step 5: Solve for x
    x = 312,531,333,451.78/640,441.92
  6. Step 6: Final answer
    x = 487,993.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.