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Finding the Fourth Proportional to 5,294.85, 7,940.60 and 1,917.21

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Solution

The fourth proportional to 5,294.85, 7,940.60 and 1,917.21 is: 2,875.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,294.85 : 7,940.60 = 1,917.21 : x
  2. Step 2: Convert to fraction form
    5,294.85/7,940.60 = 1,917.21/x
  3. Step 3: Cross multiply
    5,294.85x = 7,940.60 × 1,917.21
  4. Step 4: Simplify right side
    5,294.85x = 15,223,762.82
  5. Step 5: Solve for x
    x = 15,223,762.82/5,294.85
  6. Step 6: Final answer
    x = 2,875.20

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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.