Home / 1,312.20-1,956.53-1,264.77

Finding the Fourth Proportional to 1,312.20, 1,956.53 and 1,264.77

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Solution

The fourth proportional to 1,312.20, 1,956.53 and 1,264.77 is: 1,885.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,312.20 : 1,956.53 = 1,264.77 : x
  2. Step 2: Convert to fraction form
    1,312.20/1,956.53 = 1,264.77/x
  3. Step 3: Cross multiply
    1,312.20x = 1,956.53 × 1,264.77
  4. Step 4: Simplify right side
    1,312.20x = 2,474,563.61
  5. Step 5: Solve for x
    x = 2,474,563.61/1,312.20
  6. Step 6: Final answer
    x = 1,885.81

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.