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Finding the Fourth Proportional to 280,605.96, 387,229.86 and 153,282.12

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Solution

The fourth proportional to 280,605.96, 387,229.86 and 153,282.12 is: 211,525.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,605.96 : 387,229.86 = 153,282.12 : x
  2. Step 2: Convert to fraction form
    280,605.96/387,229.86 = 153,282.12/x
  3. Step 3: Cross multiply
    280,605.96x = 387,229.86 × 153,282.12
  4. Step 4: Simplify right side
    280,605.96x = 59,355,413,868.10
  5. Step 5: Solve for x
    x = 59,355,413,868.10/280,605.96
  6. Step 6: Final answer
    x = 211,525.85

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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.