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Finding the Fourth Proportional to 680,589.12, 939,205.32 and 374,658.96

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Solution

The fourth proportional to 680,589.12, 939,205.32 and 374,658.96 is: 517,025.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,589.12 : 939,205.32 = 374,658.96 : x
  2. Step 2: Convert to fraction form
    680,589.12/939,205.32 = 374,658.96/x
  3. Step 3: Cross multiply
    680,589.12x = 939,205.32 × 374,658.96
  4. Step 4: Simplify right side
    680,589.12x = 351,881,688,417.67
  5. Step 5: Solve for x
    x = 351,881,688,417.67/680,589.12
  6. Step 6: Final answer
    x = 517,025.14

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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.