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Finding the Fourth Proportional to 611.51, 911.03 and 603.05

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Solution

The fourth proportional to 611.51, 911.03 and 603.05 is: 898.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.51 : 911.03 = 603.05 : x
  2. Step 2: Convert to fraction form
    611.51/911.03 = 603.05/x
  3. Step 3: Cross multiply
    611.51x = 911.03 × 603.05
  4. Step 4: Simplify right side
    611.51x = 549,389.07
  5. Step 5: Solve for x
    x = 549,389.07/611.51
  6. Step 6: Final answer
    x = 898.42

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.