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Finding the Fourth Proportional to 640,577.40, 960,059.70 and 325,121.40

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Solution

The fourth proportional to 640,577.40, 960,059.70 and 325,121.40 is: 487,272.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,577.40 : 960,059.70 = 325,121.40 : x
  2. Step 2: Convert to fraction form
    640,577.40/960,059.70 = 325,121.40/x
  3. Step 3: Cross multiply
    640,577.40x = 960,059.70 × 325,121.40
  4. Step 4: Simplify right side
    640,577.40x = 312,135,953,747.58
  5. Step 5: Solve for x
    x = 312,135,953,747.58/640,577.40
  6. Step 6: Final answer
    x = 487,272.82

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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.