Home / 1,130.24-1,685.32-1,128.16

Finding the Fourth Proportional to 1,130.24, 1,685.32 and 1,128.16

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Solution

The fourth proportional to 1,130.24, 1,685.32 and 1,128.16 is: 1,682.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,130.24 : 1,685.32 = 1,128.16 : x
  2. Step 2: Convert to fraction form
    1,130.24/1,685.32 = 1,128.16/x
  3. Step 3: Cross multiply
    1,130.24x = 1,685.32 × 1,128.16
  4. Step 4: Simplify right side
    1,130.24x = 1,901,310.61
  5. Step 5: Solve for x
    x = 1,901,310.61/1,130.24
  6. Step 6: Final answer
    x = 1,682.22

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.