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Finding the Fourth Proportional to 541.32, 810.45 and 420.99

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Solution

The fourth proportional to 541.32, 810.45 and 420.99 is: 630.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    541.32 : 810.45 = 420.99 : x
  2. Step 2: Convert to fraction form
    541.32/810.45 = 420.99/x
  3. Step 3: Cross multiply
    541.32x = 810.45 × 420.99
  4. Step 4: Simplify right side
    541.32x = 341,191.35
  5. Step 5: Solve for x
    x = 341,191.35/541.32
  6. Step 6: Final answer
    x = 630.30

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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.