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Finding the Fourth Proportional to 1,603.13, 2,212.31 and 904.55

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Solution

The fourth proportional to 1,603.13, 2,212.31 and 904.55 is: 1,248.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,603.13 : 2,212.31 = 904.55 : x
  2. Step 2: Convert to fraction form
    1,603.13/2,212.31 = 904.55/x
  3. Step 3: Cross multiply
    1,603.13x = 2,212.31 × 904.55
  4. Step 4: Simplify right side
    1,603.13x = 2,001,136.21
  5. Step 5: Solve for x
    x = 2,001,136.21/1,603.13
  6. Step 6: Final answer
    x = 1,248.27

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1.5x scale

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.