Home / 3,159.40-4,739.10-3,140.20

Finding the Fourth Proportional to 3,159.40, 4,739.10 and 3,140.20

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Solution

The fourth proportional to 3,159.40, 4,739.10 and 3,140.20 is: 4,710.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,159.40 : 4,739.10 = 3,140.20 : x
  2. Step 2: Convert to fraction form
    3,159.40/4,739.10 = 3,140.20/x
  3. Step 3: Cross multiply
    3,159.40x = 4,739.10 × 3,140.20
  4. Step 4: Simplify right side
    3,159.40x = 14,881,721.82
  5. Step 5: Solve for x
    x = 14,881,721.82/3,159.40
  6. Step 6: Final answer
    x = 4,710.30

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Similar ratio
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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.