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Finding the Fourth Proportional to 553.74, 830.55 and 401.46

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Solution

The fourth proportional to 553.74, 830.55 and 401.46 is: 602.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.74 : 830.55 = 401.46 : x
  2. Step 2: Convert to fraction form
    553.74/830.55 = 401.46/x
  3. Step 3: Cross multiply
    553.74x = 830.55 × 401.46
  4. Step 4: Simplify right side
    553.74x = 333,430.99
  5. Step 5: Solve for x
    x = 333,430.99/553.74
  6. Step 6: Final answer
    x = 602.15

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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.