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Finding the Fourth Proportional to 210,628.80, 315,943.20 and 52,862.40

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Solution

The fourth proportional to 210,628.80, 315,943.20 and 52,862.40 is: 79,293.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,628.80 : 315,943.20 = 52,862.40 : x
  2. Step 2: Convert to fraction form
    210,628.80/315,943.20 = 52,862.40/x
  3. Step 3: Cross multiply
    210,628.80x = 315,943.20 × 52,862.40
  4. Step 4: Simplify right side
    210,628.80x = 16,701,515,815.68
  5. Step 5: Solve for x
    x = 16,701,515,815.68/210,628.80
  6. Step 6: Final answer
    x = 79,293.60

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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.