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Finding the Fourth Proportional to 289,344.80, 433,725.60 and 131,686.40

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Solution

The fourth proportional to 289,344.80, 433,725.60 and 131,686.40 is: 197,396.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,344.80 : 433,725.60 = 131,686.40 : x
  2. Step 2: Convert to fraction form
    289,344.80/433,725.60 = 131,686.40/x
  3. Step 3: Cross multiply
    289,344.80x = 433,725.60 × 131,686.40
  4. Step 4: Simplify right side
    289,344.80x = 57,115,762,851.84
  5. Step 5: Solve for x
    x = 57,115,762,851.84/289,344.80
  6. Step 6: Final answer
    x = 197,396.89

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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.