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Finding the Fourth Proportional to 3,130.90, 4,697.70 and 1,591.90

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Solution

The fourth proportional to 3,130.90, 4,697.70 and 1,591.90 is: 2,388.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,130.90 : 4,697.70 = 1,591.90 : x
  2. Step 2: Convert to fraction form
    3,130.90/4,697.70 = 1,591.90/x
  3. Step 3: Cross multiply
    3,130.90x = 4,697.70 × 1,591.90
  4. Step 4: Simplify right side
    3,130.90x = 7,478,268.63
  5. Step 5: Solve for x
    x = 7,478,268.63/3,130.90
  6. Step 6: Final answer
    x = 2,388.54

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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.