Home / 811,719.78-1,120,014.05-449,075.90

Finding the Fourth Proportional to 811,719.78, 1,120,014.05 and 449,075.90

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Solution

The fourth proportional to 811,719.78, 1,120,014.05 and 449,075.90 is: 619,636.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,719.78 : 1,120,014.05 = 449,075.90 : x
  2. Step 2: Convert to fraction form
    811,719.78/1,120,014.05 = 449,075.90/x
  3. Step 3: Cross multiply
    811,719.78x = 1,120,014.05 × 449,075.90
  4. Step 4: Simplify right side
    811,719.78x = 502,971,309,670.95
  5. Step 5: Solve for x
    x = 502,971,309,670.95/811,719.78
  6. Step 6: Final answer
    x = 619,636.63

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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.