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Finding the Fourth Proportional to 525,128.80, 787,911.90 and 170,251.60

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Solution

The fourth proportional to 525,128.80, 787,911.90 and 170,251.60 is: 255,448.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,128.80 : 787,911.90 = 170,251.60 : x
  2. Step 2: Convert to fraction form
    525,128.80/787,911.90 = 170,251.60/x
  3. Step 3: Cross multiply
    525,128.80x = 787,911.90 × 170,251.60
  4. Step 4: Simplify right side
    525,128.80x = 134,143,261,634.04
  5. Step 5: Solve for x
    x = 134,143,261,634.04/525,128.80
  6. Step 6: Final answer
    x = 255,448.30

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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.