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Finding the Fourth Proportional to 258,776.88, 388,214.34 and 90,345.30

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Solution

The fourth proportional to 258,776.88, 388,214.34 and 90,345.30 is: 135,535.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,776.88 : 388,214.34 = 90,345.30 : x
  2. Step 2: Convert to fraction form
    258,776.88/388,214.34 = 90,345.30/x
  3. Step 3: Cross multiply
    258,776.88x = 388,214.34 × 90,345.30
  4. Step 4: Simplify right side
    258,776.88x = 35,073,341,011.60
  5. Step 5: Solve for x
    x = 35,073,341,011.60/258,776.88
  6. Step 6: Final answer
    x = 135,535.06

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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.