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Finding the Fourth Proportional to 1,603.12, 2,212.28 and 904.64

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Solution

The fourth proportional to 1,603.12, 2,212.28 and 904.64 is: 1,248.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,603.12 : 2,212.28 = 904.64 : x
  2. Step 2: Convert to fraction form
    1,603.12/2,212.28 = 904.64/x
  3. Step 3: Cross multiply
    1,603.12x = 2,212.28 × 904.64
  4. Step 4: Simplify right side
    1,603.12x = 2,001,316.98
  5. Step 5: Solve for x
    x = 2,001,316.98/1,603.12
  6. Step 6: Final answer
    x = 1,248.39

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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.