Home / 1,312.17-1,970.95-1,268.43

Finding the Fourth Proportional to 1,312.17, 1,970.95 and 1,268.43

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Solution

The fourth proportional to 1,312.17, 1,970.95 and 1,268.43 is: 1,905.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,312.17 : 1,970.95 = 1,268.43 : x
  2. Step 2: Convert to fraction form
    1,312.17/1,970.95 = 1,268.43/x
  3. Step 3: Cross multiply
    1,312.17x = 1,970.95 × 1,268.43
  4. Step 4: Simplify right side
    1,312.17x = 2,500,012.11
  5. Step 5: Solve for x
    x = 2,500,012.11/1,312.17
  6. Step 6: Final answer
    x = 1,905.25

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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.