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Finding the Fourth Proportional to 258,752.87, 388,006.52 and 90,252.72

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Solution

The fourth proportional to 258,752.87, 388,006.52 and 90,252.72 is: 135,336.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,752.87 : 388,006.52 = 90,252.72 : x
  2. Step 2: Convert to fraction form
    258,752.87/388,006.52 = 90,252.72/x
  3. Step 3: Cross multiply
    258,752.87x = 388,006.52 × 90,252.72
  4. Step 4: Simplify right side
    258,752.87x = 35,018,643,356.47
  5. Step 5: Solve for x
    x = 35,018,643,356.47/258,752.87
  6. Step 6: Final answer
    x = 135,336.25

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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.