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Finding the Fourth Proportional to 640,584.40, 960,070.20 and 325,128.40

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Solution

The fourth proportional to 640,584.40, 960,070.20 and 325,128.40 is: 487,283.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,584.40 : 960,070.20 = 325,128.40 : x
  2. Step 2: Convert to fraction form
    640,584.40/960,070.20 = 325,128.40/x
  3. Step 3: Cross multiply
    640,584.40x = 960,070.20 × 325,128.40
  4. Step 4: Simplify right side
    640,584.40x = 312,146,088,013.68
  5. Step 5: Solve for x
    x = 312,146,088,013.68/640,584.40
  6. Step 6: Final answer
    x = 487,283.31

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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.