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Finding the Fourth Proportional to 703.92, 970.20 and 470.64

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Solution

The fourth proportional to 703.92, 970.20 and 470.64 is: 648.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    703.92 : 970.20 = 470.64 : x
  2. Step 2: Convert to fraction form
    703.92/970.20 = 470.64/x
  3. Step 3: Cross multiply
    703.92x = 970.20 × 470.64
  4. Step 4: Simplify right side
    703.92x = 456,614.93
  5. Step 5: Solve for x
    x = 456,614.93/703.92
  6. Step 6: Final answer
    x = 648.67

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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.