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Finding the Fourth Proportional to 640,573.20, 960,970.32 and 261,699.84

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Solution

The fourth proportional to 640,573.20, 960,970.32 and 261,699.84 is: 392,594.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,573.20 : 960,970.32 = 261,699.84 : x
  2. Step 2: Convert to fraction form
    640,573.20/960,970.32 = 261,699.84/x
  3. Step 3: Cross multiply
    640,573.20x = 960,970.32 × 261,699.84
  4. Step 4: Simplify right side
    640,573.20x = 251,485,778,988.75
  5. Step 5: Solve for x
    x = 251,485,778,988.75/640,573.20
  6. Step 6: Final answer
    x = 392,594.91

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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.