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Finding the Fourth Proportional to 620.03, 855.56 and 358.06

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Solution

The fourth proportional to 620.03, 855.56 and 358.06 is: 494.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.03 : 855.56 = 358.06 : x
  2. Step 2: Convert to fraction form
    620.03/855.56 = 358.06/x
  3. Step 3: Cross multiply
    620.03x = 855.56 × 358.06
  4. Step 4: Simplify right side
    620.03x = 306,341.81
  5. Step 5: Solve for x
    x = 306,341.81/620.03
  6. Step 6: Final answer
    x = 494.08

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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.