Home / 1,117.16-1,533.42-990.04

Finding the Fourth Proportional to 1,117.16, 1,533.42 and 990.04

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Solution

The fourth proportional to 1,117.16, 1,533.42 and 990.04 is: 1,358.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,117.16 : 1,533.42 = 990.04 : x
  2. Step 2: Convert to fraction form
    1,117.16/1,533.42 = 990.04/x
  3. Step 3: Cross multiply
    1,117.16x = 1,533.42 × 990.04
  4. Step 4: Simplify right side
    1,117.16x = 1,518,147.14
  5. Step 5: Solve for x
    x = 1,518,147.14/1,117.16
  6. Step 6: Final answer
    x = 1,358.93

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.