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Finding the Fourth Proportional to 640,566.40, 960,043.20 and 325,110.40

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Solution

The fourth proportional to 640,566.40, 960,043.20 and 325,110.40 is: 487,256.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,566.40 : 960,043.20 = 325,110.40 : x
  2. Step 2: Convert to fraction form
    640,566.40/960,043.20 = 325,110.40/x
  3. Step 3: Cross multiply
    640,566.40x = 960,043.20 × 325,110.40
  4. Step 4: Simplify right side
    640,566.40x = 312,120,028,769.28
  5. Step 5: Solve for x
    x = 312,120,028,769.28/640,566.40
  6. Step 6: Final answer
    x = 487,256.32

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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.