Home / 1,228.93-1,686.38-1,117.55

Finding the Fourth Proportional to 1,228.93, 1,686.38 and 1,117.55

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Solution

The fourth proportional to 1,228.93, 1,686.38 and 1,117.55 is: 1,533.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,228.93 : 1,686.38 = 1,117.55 : x
  2. Step 2: Convert to fraction form
    1,228.93/1,686.38 = 1,117.55/x
  3. Step 3: Cross multiply
    1,228.93x = 1,686.38 × 1,117.55
  4. Step 4: Simplify right side
    1,228.93x = 1,884,618.88
  5. Step 5: Solve for x
    x = 1,884,618.88/1,228.93
  6. Step 6: Final answer
    x = 1,533.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.