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Finding the Fourth Proportional to 280,257.75, 386,763.90 and 152,941.55

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Solution

The fourth proportional to 280,257.75, 386,763.90 and 152,941.55 is: 211,063.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,257.75 : 386,763.90 = 152,941.55 : x
  2. Step 2: Convert to fraction form
    280,257.75/386,763.90 = 152,941.55/x
  3. Step 3: Cross multiply
    280,257.75x = 386,763.90 × 152,941.55
  4. Step 4: Simplify right side
    280,257.75x = 59,152,267,842.69
  5. Step 5: Solve for x
    x = 59,152,267,842.69/280,257.75
  6. Step 6: Final answer
    x = 211,063.81

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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.