Home / 811,719.28-1,120,013.35-449,075.40

Finding the Fourth Proportional to 811,719.28, 1,120,013.35 and 449,075.40

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Solution

The fourth proportional to 811,719.28, 1,120,013.35 and 449,075.40 is: 619,635.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,719.28 : 1,120,013.35 = 449,075.40 : x
  2. Step 2: Convert to fraction form
    811,719.28/1,120,013.35 = 449,075.40/x
  3. Step 3: Cross multiply
    811,719.28x = 1,120,013.35 × 449,075.40
  4. Step 4: Simplify right side
    811,719.28x = 502,970,443,156.59
  5. Step 5: Solve for x
    x = 502,970,443,156.59/811,719.28
  6. Step 6: Final answer
    x = 619,635.95

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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.