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Finding the Fourth Proportional to 280,376.80, 386,915.01 and 159,515.49

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Solution

The fourth proportional to 280,376.80, 386,915.01 and 159,515.49 is: 220,128.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,376.80 : 386,915.01 = 159,515.49 : x
  2. Step 2: Convert to fraction form
    280,376.80/386,915.01 = 159,515.49/x
  3. Step 3: Cross multiply
    280,376.80x = 386,915.01 × 159,515.49
  4. Step 4: Simplify right side
    280,376.80x = 61,718,937,408.50
  5. Step 5: Solve for x
    x = 61,718,937,408.50/280,376.80
  6. Step 6: Final answer
    x = 220,128.55

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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.