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Finding the Fourth Proportional to 388,361.72, 536,104.88 and 261,111.13

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Solution

The fourth proportional to 388,361.72, 536,104.88 and 261,111.13 is: 360,444.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,361.72 : 536,104.88 = 261,111.13 : x
  2. Step 2: Convert to fraction form
    388,361.72/536,104.88 = 261,111.13/x
  3. Step 3: Cross multiply
    388,361.72x = 536,104.88 × 261,111.13
  4. Step 4: Simplify right side
    388,361.72x = 139,982,949,348.66
  5. Step 5: Solve for x
    x = 139,982,949,348.66/388,361.72
  6. Step 6: Final answer
    x = 360,444.76

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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.