Home / 2,312.40-3,190.20-1,303.88

Finding the Fourth Proportional to 2,312.40, 3,190.20 and 1,303.88

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Solution

The fourth proportional to 2,312.40, 3,190.20 and 1,303.88 is: 1,798.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,312.40 : 3,190.20 = 1,303.88 : x
  2. Step 2: Convert to fraction form
    2,312.40/3,190.20 = 1,303.88/x
  3. Step 3: Cross multiply
    2,312.40x = 3,190.20 × 1,303.88
  4. Step 4: Simplify right side
    2,312.40x = 4,159,637.98
  5. Step 5: Solve for x
    x = 4,159,637.98/2,312.40
  6. Step 6: Final answer
    x = 1,798.84

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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.