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Finding the Fourth Proportional to 970.16, 1,455.57 and 320.94

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Solution

The fourth proportional to 970.16, 1,455.57 and 320.94 is: 481.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    970.16 : 1,455.57 = 320.94 : x
  2. Step 2: Convert to fraction form
    970.16/1,455.57 = 320.94/x
  3. Step 3: Cross multiply
    970.16x = 1,455.57 × 320.94
  4. Step 4: Simplify right side
    970.16x = 467,150.64
  5. Step 5: Solve for x
    x = 467,150.64/970.16
  6. Step 6: Final answer
    x = 481.52

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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.