Home / 811,445.11-1,217,278.40-338,019.75

Finding the Fourth Proportional to 811,445.11, 1,217,278.40 and 338,019.75

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Solution

The fourth proportional to 811,445.11, 1,217,278.40 and 338,019.75 is: 507,075.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,445.11 : 1,217,278.40 = 338,019.75 : x
  2. Step 2: Convert to fraction form
    811,445.11/1,217,278.40 = 338,019.75/x
  3. Step 3: Cross multiply
    811,445.11x = 1,217,278.40 × 338,019.75
  4. Step 4: Simplify right side
    811,445.11x = 411,464,138,758.30
  5. Step 5: Solve for x
    x = 411,464,138,758.30/811,445.11
  6. Step 6: Final answer
    x = 507,075.75

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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.