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Finding the Fourth Proportional to 529.79, 794.48 and 438.66

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Solution

The fourth proportional to 529.79, 794.48 and 438.66 is: 657.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    529.79 : 794.48 = 438.66 : x
  2. Step 2: Convert to fraction form
    529.79/794.48 = 438.66/x
  3. Step 3: Cross multiply
    529.79x = 794.48 × 438.66
  4. Step 4: Simplify right side
    529.79x = 348,504.40
  5. Step 5: Solve for x
    x = 348,504.40/529.79
  6. Step 6: Final answer
    x = 657.82

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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.