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Finding the Fourth Proportional to 280,552.80, 420,888.38 and 90,998.44

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Solution

The fourth proportional to 280,552.80, 420,888.38 and 90,998.44 is: 136,516.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,552.80 : 420,888.38 = 90,998.44 : x
  2. Step 2: Convert to fraction form
    280,552.80/420,888.38 = 90,998.44/x
  3. Step 3: Cross multiply
    280,552.80x = 420,888.38 × 90,998.44
  4. Step 4: Simplify right side
    280,552.80x = 38,300,185,994.13
  5. Step 5: Solve for x
    x = 38,300,185,994.13/280,552.80
  6. Step 6: Final answer
    x = 136,516.86

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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.