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Finding the Fourth Proportional to 640,422.80, 959,251.80 and 529,830.80

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Solution

The fourth proportional to 640,422.80, 959,251.80 and 529,830.80 is: 793,602.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,422.80 : 959,251.80 = 529,830.80 : x
  2. Step 2: Convert to fraction form
    640,422.80/959,251.80 = 529,830.80/x
  3. Step 3: Cross multiply
    640,422.80x = 959,251.80 × 529,830.80
  4. Step 4: Simplify right side
    640,422.80x = 508,241,148,595.44
  5. Step 5: Solve for x
    x = 508,241,148,595.44/640,422.80
  6. Step 6: Final answer
    x = 793,602.52

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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.