Home / 512,985.69-769,517.21-153,128.12

Finding the Fourth Proportional to 512,985.69, 769,517.21 and 153,128.12

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Solution

The fourth proportional to 512,985.69, 769,517.21 and 153,128.12 is: 229,703.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,985.69 : 769,517.21 = 153,128.12 : x
  2. Step 2: Convert to fraction form
    512,985.69/769,517.21 = 153,128.12/x
  3. Step 3: Cross multiply
    512,985.69x = 769,517.21 × 153,128.12
  4. Step 4: Simplify right side
    512,985.69x = 117,834,719,061.72
  5. Step 5: Solve for x
    x = 117,834,719,061.72/512,985.69
  6. Step 6: Final answer
    x = 229,703.72

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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.