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Finding the Fourth Proportional to 699,875.88, 965,859.30 and 393,972

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Solution

The fourth proportional to 699,875.88, 965,859.30 and 393,972 is: 543,698.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    699,875.88 : 965,859.30 = 393,972 : x
  2. Step 2: Convert to fraction form
    699,875.88/965,859.30 = 393,972/x
  3. Step 3: Cross multiply
    699,875.88x = 965,859.30 × 393,972
  4. Step 4: Simplify right side
    699,875.88x = 380,521,520,139.60
  5. Step 5: Solve for x
    x = 380,521,520,139.60/699,875.88
  6. Step 6: Final answer
    x = 543,698.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.