Home / 1,513.12-2,087.48-1,009.20

Finding the Fourth Proportional to 1,513.12, 2,087.48 and 1,009.20

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Solution

The fourth proportional to 1,513.12, 2,087.48 and 1,009.20 is: 1,392.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,513.12 : 2,087.48 = 1,009.20 : x
  2. Step 2: Convert to fraction form
    1,513.12/2,087.48 = 1,009.20/x
  3. Step 3: Cross multiply
    1,513.12x = 2,087.48 × 1,009.20
  4. Step 4: Simplify right side
    1,513.12x = 2,106,684.82
  5. Step 5: Solve for x
    x = 2,106,684.82/1,513.12
  6. Step 6: Final answer
    x = 1,392.28

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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.