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Finding the Fourth Proportional to 317,972.60, 438,706.50 and 190,601.72

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Solution

The fourth proportional to 317,972.60, 438,706.50 and 190,601.72 is: 262,973.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,972.60 : 438,706.50 = 190,601.72 : x
  2. Step 2: Convert to fraction form
    317,972.60/438,706.50 = 190,601.72/x
  3. Step 3: Cross multiply
    317,972.60x = 438,706.50 × 190,601.72
  4. Step 4: Simplify right side
    317,972.60x = 83,618,213,475.18
  5. Step 5: Solve for x
    x = 83,618,213,475.18/317,972.60
  6. Step 6: Final answer
    x = 262,973.02

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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.