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Finding the Fourth Proportional to 321,338.90, 479,135.48 and 312,510.98

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Solution

The fourth proportional to 321,338.90, 479,135.48 and 312,510.98 is: 465,972.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,338.90 : 479,135.48 = 312,510.98 : x
  2. Step 2: Convert to fraction form
    321,338.90/479,135.48 = 312,510.98/x
  3. Step 3: Cross multiply
    321,338.90x = 479,135.48 × 312,510.98
  4. Step 4: Simplify right side
    321,338.90x = 149,735,098,407.57
  5. Step 5: Solve for x
    x = 149,735,098,407.57/321,338.90
  6. Step 6: Final answer
    x = 465,972.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.