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Finding the Fourth Proportional to 520.90, 719.15 and 324.68

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Solution

The fourth proportional to 520.90, 719.15 and 324.68 is: 448.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.90 : 719.15 = 324.68 : x
  2. Step 2: Convert to fraction form
    520.90/719.15 = 324.68/x
  3. Step 3: Cross multiply
    520.90x = 719.15 × 324.68
  4. Step 4: Simplify right side
    520.90x = 233,488.40
  5. Step 5: Solve for x
    x = 233,488.40/520.90
  6. Step 6: Final answer
    x = 448.24

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1.5x scale

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.