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Finding the Fourth Proportional to 353,142.80, 528,936.60 and 313,744.40

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Solution

The fourth proportional to 353,142.80, 528,936.60 and 313,744.40 is: 469,925.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,142.80 : 528,936.60 = 313,744.40 : x
  2. Step 2: Convert to fraction form
    353,142.80/528,936.60 = 313,744.40/x
  3. Step 3: Cross multiply
    353,142.80x = 528,936.60 × 313,744.40
  4. Step 4: Simplify right side
    353,142.80x = 165,950,896,205.04
  5. Step 5: Solve for x
    x = 165,950,896,205.04/353,142.80
  6. Step 6: Final answer
    x = 469,925.75

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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.