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Finding the Fourth Proportional to 1,403.04, 2,106 and 992.64

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Solution

The fourth proportional to 1,403.04, 2,106 and 992.64 is: 1,489.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,403.04 : 2,106 = 992.64 : x
  2. Step 2: Convert to fraction form
    1,403.04/2,106 = 992.64/x
  3. Step 3: Cross multiply
    1,403.04x = 2,106 × 992.64
  4. Step 4: Simplify right side
    1,403.04x = 2,090,499.84
  5. Step 5: Solve for x
    x = 2,090,499.84/1,403.04
  6. Step 6: Final answer
    x = 1,489.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.