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Finding the Fourth Proportional to 390.24, 538.26 and 259.02

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Solution

The fourth proportional to 390.24, 538.26 and 259.02 is: 357.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    390.24 : 538.26 = 259.02 : x
  2. Step 2: Convert to fraction form
    390.24/538.26 = 259.02/x
  3. Step 3: Cross multiply
    390.24x = 538.26 × 259.02
  4. Step 4: Simplify right side
    390.24x = 139,420.11
  5. Step 5: Solve for x
    x = 139,420.11/390.24
  6. Step 6: Final answer
    x = 357.27

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.