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Finding the Fourth Proportional to 286,900.82, 395,915.18 and 156,074.14

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Solution

The fourth proportional to 286,900.82, 395,915.18 and 156,074.14 is: 215,377.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,900.82 : 395,915.18 = 156,074.14 : x
  2. Step 2: Convert to fraction form
    286,900.82/395,915.18 = 156,074.14/x
  3. Step 3: Cross multiply
    286,900.82x = 395,915.18 × 156,074.14
  4. Step 4: Simplify right side
    286,900.82x = 61,792,119,251.87
  5. Step 5: Solve for x
    x = 61,792,119,251.87/286,900.82
  6. Step 6: Final answer
    x = 215,377.98

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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.