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Finding the Fourth Proportional to 388,363.44, 536,106.72 and 261,112.80

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Solution

The fourth proportional to 388,363.44, 536,106.72 and 261,112.80 is: 360,446.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,363.44 : 536,106.72 = 261,112.80 : x
  2. Step 2: Convert to fraction form
    388,363.44/536,106.72 = 261,112.80/x
  3. Step 3: Cross multiply
    388,363.44x = 536,106.72 × 261,112.80
  4. Step 4: Simplify right side
    388,363.44x = 139,984,326,758.02
  5. Step 5: Solve for x
    x = 139,984,326,758.02/388,363.44
  6. Step 6: Final answer
    x = 360,446.72

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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.