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Finding the Fourth Proportional to 1,607.69, 2,218.66 and 899.51

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Solution

The fourth proportional to 1,607.69, 2,218.66 and 899.51 is: 1,241.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,607.69 : 2,218.66 = 899.51 : x
  2. Step 2: Convert to fraction form
    1,607.69/2,218.66 = 899.51/x
  3. Step 3: Cross multiply
    1,607.69x = 2,218.66 × 899.51
  4. Step 4: Simplify right side
    1,607.69x = 1,995,710.15
  5. Step 5: Solve for x
    x = 1,995,710.15/1,607.69
  6. Step 6: Final answer
    x = 1,241.35

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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.