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Finding the Fourth Proportional to 620,639.60, 931,121.40 and 199,925.60

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Solution

The fourth proportional to 620,639.60, 931,121.40 and 199,925.60 is: 299,940.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,639.60 : 931,121.40 = 199,925.60 : x
  2. Step 2: Convert to fraction form
    620,639.60/931,121.40 = 199,925.60/x
  3. Step 3: Cross multiply
    620,639.60x = 931,121.40 × 199,925.60
  4. Step 4: Simplify right side
    620,639.60x = 186,155,004,567.84
  5. Step 5: Solve for x
    x = 186,155,004,567.84/620,639.60
  6. Step 6: Final answer
    x = 299,940.58

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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.