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Finding the Fourth Proportional to 280,381.40, 386,874.57 and 159,515.63

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Solution

The fourth proportional to 280,381.40, 386,874.57 and 159,515.63 is: 220,102.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,381.40 : 386,874.57 = 159,515.63 : x
  2. Step 2: Convert to fraction form
    280,381.40/386,874.57 = 159,515.63/x
  3. Step 3: Cross multiply
    280,381.40x = 386,874.57 × 159,515.63
  4. Step 4: Simplify right side
    280,381.40x = 61,712,540,764.53
  5. Step 5: Solve for x
    x = 61,712,540,764.53/280,381.40
  6. Step 6: Final answer
    x = 220,102.12

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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.