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Finding the Fourth Proportional to 473.30, 653.06 and 421.06

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Solution

The fourth proportional to 473.30, 653.06 and 421.06 is: 580.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    473.30 : 653.06 = 421.06 : x
  2. Step 2: Convert to fraction form
    473.30/653.06 = 421.06/x
  3. Step 3: Cross multiply
    473.30x = 653.06 × 421.06
  4. Step 4: Simplify right side
    473.30x = 274,977.44
  5. Step 5: Solve for x
    x = 274,977.44/473.30
  6. Step 6: Final answer
    x = 580.98

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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.