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Finding the Fourth Proportional to 7,312.60, 10,968.90 and 4,688.20

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Solution

The fourth proportional to 7,312.60, 10,968.90 and 4,688.20 is: 7,032.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,312.60 : 10,968.90 = 4,688.20 : x
  2. Step 2: Convert to fraction form
    7,312.60/10,968.90 = 4,688.20/x
  3. Step 3: Cross multiply
    7,312.60x = 10,968.90 × 4,688.20
  4. Step 4: Simplify right side
    7,312.60x = 51,424,396.98
  5. Step 5: Solve for x
    x = 51,424,396.98/7,312.60
  6. Step 6: Final answer
    x = 7,032.30

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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.