Home / 1,317.15-1,816.20-1,077.14

Finding the Fourth Proportional to 1,317.15, 1,816.20 and 1,077.14

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Solution

The fourth proportional to 1,317.15, 1,816.20 and 1,077.14 is: 1,485.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317.15 : 1,816.20 = 1,077.14 : x
  2. Step 2: Convert to fraction form
    1,317.15/1,816.20 = 1,077.14/x
  3. Step 3: Cross multiply
    1,317.15x = 1,816.20 × 1,077.14
  4. Step 4: Simplify right side
    1,317.15x = 1,956,292.59
  5. Step 5: Solve for x
    x = 1,956,292.59/1,317.15
  6. Step 6: Final answer
    x = 1,485.25

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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.