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Finding the Fourth Proportional to 659.78, 909.48 and 473.48

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Solution

The fourth proportional to 659.78, 909.48 and 473.48 is: 652.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    659.78 : 909.48 = 473.48 : x
  2. Step 2: Convert to fraction form
    659.78/909.48 = 473.48/x
  3. Step 3: Cross multiply
    659.78x = 909.48 × 473.48
  4. Step 4: Simplify right side
    659.78x = 430,620.59
  5. Step 5: Solve for x
    x = 430,620.59/659.78
  6. Step 6: Final answer
    x = 652.67

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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.