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Finding the Fourth Proportional to 891,806.10, 1,337,709.15 and 418,539.30

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Solution

The fourth proportional to 891,806.10, 1,337,709.15 and 418,539.30 is: 627,808.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    891,806.10 : 1,337,709.15 = 418,539.30 : x
  2. Step 2: Convert to fraction form
    891,806.10/1,337,709.15 = 418,539.30/x
  3. Step 3: Cross multiply
    891,806.10x = 1,337,709.15 × 418,539.30
  4. Step 4: Simplify right side
    891,806.10x = 559,883,851,244.60
  5. Step 5: Solve for x
    x = 559,883,851,244.60/891,806.10
  6. Step 6: Final answer
    x = 627,808.95

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Double scale
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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.