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Finding the Fourth Proportional to 644,429.80, 965,478.30 and 551,117.80

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Solution

The fourth proportional to 644,429.80, 965,478.30 and 551,117.80 is: 825,679.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,429.80 : 965,478.30 = 551,117.80 : x
  2. Step 2: Convert to fraction form
    644,429.80/965,478.30 = 551,117.80/x
  3. Step 3: Cross multiply
    644,429.80x = 965,478.30 × 551,117.80
  4. Step 4: Simplify right side
    644,429.80x = 532,092,276,643.74
  5. Step 5: Solve for x
    x = 532,092,276,643.74/644,429.80
  6. Step 6: Final answer
    x = 825,679.19

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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.