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Finding the Fourth Proportional to 520.18, 718.65 and 442.33

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Solution

The fourth proportional to 520.18, 718.65 and 442.33 is: 611.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.18 : 718.65 = 442.33 : x
  2. Step 2: Convert to fraction form
    520.18/718.65 = 442.33/x
  3. Step 3: Cross multiply
    520.18x = 718.65 × 442.33
  4. Step 4: Simplify right side
    520.18x = 317,880.45
  5. Step 5: Solve for x
    x = 317,880.45/520.18
  6. Step 6: Final answer
    x = 611.10

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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.