Home / 818,131.45-1,128,963.72-512,193.82

Finding the Fourth Proportional to 818,131.45, 1,128,963.72 and 512,193.82

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Solution

The fourth proportional to 818,131.45, 1,128,963.72 and 512,193.82 is: 706,791.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    818,131.45 : 1,128,963.72 = 512,193.82 : x
  2. Step 2: Convert to fraction form
    818,131.45/1,128,963.72 = 512,193.82/x
  3. Step 3: Cross multiply
    818,131.45x = 1,128,963.72 × 512,193.82
  4. Step 4: Simplify right side
    818,131.45x = 578,248,240,388.21
  5. Step 5: Solve for x
    x = 578,248,240,388.21/818,131.45
  6. Step 6: Final answer
    x = 706,791.36

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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.