Home / 1,192.12-1,645.50-1,130.20

Finding the Fourth Proportional to 1,192.12, 1,645.50 and 1,130.20

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Solution

The fourth proportional to 1,192.12, 1,645.50 and 1,130.20 is: 1,560.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,192.12 : 1,645.50 = 1,130.20 : x
  2. Step 2: Convert to fraction form
    1,192.12/1,645.50 = 1,130.20/x
  3. Step 3: Cross multiply
    1,192.12x = 1,645.50 × 1,130.20
  4. Step 4: Simplify right side
    1,192.12x = 1,859,744.10
  5. Step 5: Solve for x
    x = 1,859,744.10/1,192.12
  6. Step 6: Final answer
    x = 1,560.03

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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.