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Finding the Fourth Proportional to 286,700.60, 429,921.30 and 128,847.80

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Solution

The fourth proportional to 286,700.60, 429,921.30 and 128,847.80 is: 193,213.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,700.60 : 429,921.30 = 128,847.80 : x
  2. Step 2: Convert to fraction form
    286,700.60/429,921.30 = 128,847.80/x
  3. Step 3: Cross multiply
    286,700.60x = 429,921.30 × 128,847.80
  4. Step 4: Simplify right side
    286,700.60x = 55,394,413,678.14
  5. Step 5: Solve for x
    x = 55,394,413,678.14/286,700.60
  6. Step 6: Final answer
    x = 193,213.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.