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Finding the Fourth Proportional to 620.19, 931.41 and 611.01

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Solution

The fourth proportional to 620.19, 931.41 and 611.01 is: 917.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.19 : 931.41 = 611.01 : x
  2. Step 2: Convert to fraction form
    620.19/931.41 = 611.01/x
  3. Step 3: Cross multiply
    620.19x = 931.41 × 611.01
  4. Step 4: Simplify right side
    620.19x = 569,100.82
  5. Step 5: Solve for x
    x = 569,100.82/620.19
  6. Step 6: Final answer
    x = 917.62

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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.