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Finding the Fourth Proportional to 388,334.80, 536,165.35 and 243,198.80

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Solution

The fourth proportional to 388,334.80, 536,165.35 and 243,198.80 is: 335,779.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,334.80 : 536,165.35 = 243,198.80 : x
  2. Step 2: Convert to fraction form
    388,334.80/536,165.35 = 243,198.80/x
  3. Step 3: Cross multiply
    388,334.80x = 536,165.35 × 243,198.80
  4. Step 4: Simplify right side
    388,334.80x = 130,394,766,432.76
  5. Step 5: Solve for x
    x = 130,394,766,432.76/388,334.80
  6. Step 6: Final answer
    x = 335,779.25

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1.5x scale

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.