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Finding the Fourth Proportional to 640,564.40, 960,040.20 and 325,108.40

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Solution

The fourth proportional to 640,564.40, 960,040.20 and 325,108.40 is: 487,253.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,564.40 : 960,040.20 = 325,108.40 : x
  2. Step 2: Convert to fraction form
    640,564.40/960,040.20 = 325,108.40/x
  3. Step 3: Cross multiply
    640,564.40x = 960,040.20 × 325,108.40
  4. Step 4: Simplify right side
    640,564.40x = 312,117,133,357.68
  5. Step 5: Solve for x
    x = 312,117,133,357.68/640,564.40
  6. Step 6: Final answer
    x = 487,253.32

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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.