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Finding the Fourth Proportional to 469.64, 703.20 and 315.56

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Solution

The fourth proportional to 469.64, 703.20 and 315.56 is: 472.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    469.64 : 703.20 = 315.56 : x
  2. Step 2: Convert to fraction form
    469.64/703.20 = 315.56/x
  3. Step 3: Cross multiply
    469.64x = 703.20 × 315.56
  4. Step 4: Simplify right side
    469.64x = 221,901.79
  5. Step 5: Solve for x
    x = 221,901.79/469.64
  6. Step 6: Final answer
    x = 472.49

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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.