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Finding the Fourth Proportional to 430.13, 644.58 and 247.14

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Solution

The fourth proportional to 430.13, 644.58 and 247.14 is: 370.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    430.13 : 644.58 = 247.14 : x
  2. Step 2: Convert to fraction form
    430.13/644.58 = 247.14/x
  3. Step 3: Cross multiply
    430.13x = 644.58 × 247.14
  4. Step 4: Simplify right side
    430.13x = 159,301.50
  5. Step 5: Solve for x
    x = 159,301.50/430.13
  6. Step 6: Final answer
    x = 370.36

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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.