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Finding the Fourth Proportional to 647.56, 970.16 and 301.20

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Solution

The fourth proportional to 647.56, 970.16 and 301.20 is: 451.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    647.56 : 970.16 = 301.20 : x
  2. Step 2: Convert to fraction form
    647.56/970.16 = 301.20/x
  3. Step 3: Cross multiply
    647.56x = 970.16 × 301.20
  4. Step 4: Simplify right side
    647.56x = 292,212.19
  5. Step 5: Solve for x
    x = 292,212.19/647.56
  6. Step 6: Final answer
    x = 451.25

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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.