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Finding the Fourth Proportional to 768,555.70, 1,152,875.60 and 319,322

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Solution

The fourth proportional to 768,555.70, 1,152,875.60 and 319,322 is: 479,000.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,555.70 : 1,152,875.60 = 319,322 : x
  2. Step 2: Convert to fraction form
    768,555.70/1,152,875.60 = 319,322/x
  3. Step 3: Cross multiply
    768,555.70x = 1,152,875.60 × 319,322
  4. Step 4: Simplify right side
    768,555.70x = 368,138,542,343.20
  5. Step 5: Solve for x
    x = 368,138,542,343.20/768,555.70
  6. Step 6: Final answer
    x = 479,000.47

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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.