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Finding the Fourth Proportional to 319,911.90, 480,033.45 and 130,511.10

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Solution

The fourth proportional to 319,911.90, 480,033.45 and 130,511.10 is: 195,834.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,911.90 : 480,033.45 = 130,511.10 : x
  2. Step 2: Convert to fraction form
    319,911.90/480,033.45 = 130,511.10/x
  3. Step 3: Cross multiply
    319,911.90x = 480,033.45 × 130,511.10
  4. Step 4: Simplify right side
    319,911.90x = 62,649,693,596.30
  5. Step 5: Solve for x
    x = 62,649,693,596.30/319,911.90
  6. Step 6: Final answer
    x = 195,834.21

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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.