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Finding the Fourth Proportional to 489,626.87, 675,511.87 and 319,959.41

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Solution

The fourth proportional to 489,626.87, 675,511.87 and 319,959.41 is: 441,430.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,626.87 : 675,511.87 = 319,959.41 : x
  2. Step 2: Convert to fraction form
    489,626.87/675,511.87 = 319,959.41/x
  3. Step 3: Cross multiply
    489,626.87x = 675,511.87 × 319,959.41
  4. Step 4: Simplify right side
    489,626.87x = 216,136,376,929.01
  5. Step 5: Solve for x
    x = 216,136,376,929.01/489,626.87
  6. Step 6: Final answer
    x = 441,430.79

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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.