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Finding the Fourth Proportional to 390.03, 537.90 and 337.55

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Solution

The fourth proportional to 390.03, 537.90 and 337.55 is: 465.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    390.03 : 537.90 = 337.55 : x
  2. Step 2: Convert to fraction form
    390.03/537.90 = 337.55/x
  3. Step 3: Cross multiply
    390.03x = 537.90 × 337.55
  4. Step 4: Simplify right side
    390.03x = 181,567.80
  5. Step 5: Solve for x
    x = 181,567.80/390.03
  6. Step 6: Final answer
    x = 465.53

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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.