Home / 1,117.86-1,541.95-720.04

Finding the Fourth Proportional to 1,117.86, 1,541.95 and 720.04

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Solution

The fourth proportional to 1,117.86, 1,541.95 and 720.04 is: 993.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,117.86 : 1,541.95 = 720.04 : x
  2. Step 2: Convert to fraction form
    1,117.86/1,541.95 = 720.04/x
  3. Step 3: Cross multiply
    1,117.86x = 1,541.95 × 720.04
  4. Step 4: Simplify right side
    1,117.86x = 1,110,268.51
  5. Step 5: Solve for x
    x = 1,110,268.51/1,117.86
  6. Step 6: Final answer
    x = 993.21

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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.