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Finding the Fourth Proportional to 258,752.72, 388,006.28 and 90,252.58

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Solution

The fourth proportional to 258,752.72, 388,006.28 and 90,252.58 is: 135,336.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,752.72 : 388,006.28 = 90,252.58 : x
  2. Step 2: Convert to fraction form
    258,752.72/388,006.28 = 90,252.58/x
  3. Step 3: Cross multiply
    258,752.72x = 388,006.28 × 90,252.58
  4. Step 4: Simplify right side
    258,752.72x = 35,018,567,826.20
  5. Step 5: Solve for x
    x = 35,018,567,826.20/258,752.72
  6. Step 6: Final answer
    x = 135,336.04

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1.5x scale

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.