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Finding the Fourth Proportional to 659.63, 909.70 and 474.34

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Solution

The fourth proportional to 659.63, 909.70 and 474.34 is: 654.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    659.63 : 909.70 = 474.34 : x
  2. Step 2: Convert to fraction form
    659.63/909.70 = 474.34/x
  3. Step 3: Cross multiply
    659.63x = 909.70 × 474.34
  4. Step 4: Simplify right side
    659.63x = 431,502.55
  5. Step 5: Solve for x
    x = 431,502.55/659.63
  6. Step 6: Final answer
    x = 654.16

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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.