Home / 1,653.36-2,281.32-1,129.20

Finding the Fourth Proportional to 1,653.36, 2,281.32 and 1,129.20

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Solution

The fourth proportional to 1,653.36, 2,281.32 and 1,129.20 is: 1,558.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,653.36 : 2,281.32 = 1,129.20 : x
  2. Step 2: Convert to fraction form
    1,653.36/2,281.32 = 1,129.20/x
  3. Step 3: Cross multiply
    1,653.36x = 2,281.32 × 1,129.20
  4. Step 4: Simplify right side
    1,653.36x = 2,576,066.54
  5. Step 5: Solve for x
    x = 2,576,066.54/1,653.36
  6. Step 6: Final answer
    x = 1,558.08

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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.