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Finding the Fourth Proportional to 656,357.85, 905,774.40 and 354,551.85

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Solution

The fourth proportional to 656,357.85, 905,774.40 and 354,551.85 is: 489,281.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,357.85 : 905,774.40 = 354,551.85 : x
  2. Step 2: Convert to fraction form
    656,357.85/905,774.40 = 354,551.85/x
  3. Step 3: Cross multiply
    656,357.85x = 905,774.40 × 354,551.85
  4. Step 4: Simplify right side
    656,357.85x = 321,143,989,202.64
  5. Step 5: Solve for x
    x = 321,143,989,202.64/656,357.85
  6. Step 6: Final answer
    x = 489,281.86

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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.