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Finding the Fourth Proportional to 620,972.60, 931,458.90 and 561,923.60

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Solution

The fourth proportional to 620,972.60, 931,458.90 and 561,923.60 is: 842,885.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,972.60 : 931,458.90 = 561,923.60 : x
  2. Step 2: Convert to fraction form
    620,972.60/931,458.90 = 561,923.60/x
  3. Step 3: Cross multiply
    620,972.60x = 931,458.90 × 561,923.60
  4. Step 4: Simplify right side
    620,972.60x = 523,408,738,340.04
  5. Step 5: Solve for x
    x = 523,408,738,340.04/620,972.60
  6. Step 6: Final answer
    x = 842,885.40

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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.