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Finding the Fourth Proportional to 598.78, 899.79 and 417.34

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Solution

The fourth proportional to 598.78, 899.79 and 417.34 is: 627.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    598.78 : 899.79 = 417.34 : x
  2. Step 2: Convert to fraction form
    598.78/899.79 = 417.34/x
  3. Step 3: Cross multiply
    598.78x = 899.79 × 417.34
  4. Step 4: Simplify right side
    598.78x = 375,518.36
  5. Step 5: Solve for x
    x = 375,518.36/598.78
  6. Step 6: Final answer
    x = 627.14

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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.