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Finding the Fourth Proportional to 421.08, 631.52 and 370.05

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Solution

The fourth proportional to 421.08, 631.52 and 370.05 is: 554.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    421.08 : 631.52 = 370.05 : x
  2. Step 2: Convert to fraction form
    421.08/631.52 = 370.05/x
  3. Step 3: Cross multiply
    421.08x = 631.52 × 370.05
  4. Step 4: Simplify right side
    421.08x = 233,692.13
  5. Step 5: Solve for x
    x = 233,692.13/421.08
  6. Step 6: Final answer
    x = 554.98

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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.