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Finding the Fourth Proportional to 765,625.78, 1,148,611.69 and 253,289.72

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Solution

The fourth proportional to 765,625.78, 1,148,611.69 and 253,289.72 is: 379,991.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    765,625.78 : 1,148,611.69 = 253,289.72 : x
  2. Step 2: Convert to fraction form
    765,625.78/1,148,611.69 = 253,289.72/x
  3. Step 3: Cross multiply
    765,625.78x = 1,148,611.69 × 253,289.72
  4. Step 4: Simplify right side
    765,625.78x = 290,931,533,348.83
  5. Step 5: Solve for x
    x = 290,931,533,348.83/765,625.78
  6. Step 6: Final answer
    x = 379,991.82

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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.