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Finding the Fourth Proportional to 430.58, 644.72 and 247.04

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Solution

The fourth proportional to 430.58, 644.72 and 247.04 is: 369.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    430.58 : 644.72 = 247.04 : x
  2. Step 2: Convert to fraction form
    430.58/644.72 = 247.04/x
  3. Step 3: Cross multiply
    430.58x = 644.72 × 247.04
  4. Step 4: Simplify right side
    430.58x = 159,271.63
  5. Step 5: Solve for x
    x = 159,271.63/430.58
  6. Step 6: Final answer
    x = 369.90

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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.