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Finding the Fourth Proportional to 665.40, 917.82 and 432.12

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Solution

The fourth proportional to 665.40, 917.82 and 432.12 is: 596.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.40 : 917.82 = 432.12 : x
  2. Step 2: Convert to fraction form
    665.40/917.82 = 432.12/x
  3. Step 3: Cross multiply
    665.40x = 917.82 × 432.12
  4. Step 4: Simplify right side
    665.40x = 396,608.38
  5. Step 5: Solve for x
    x = 396,608.38/665.40
  6. Step 6: Final answer
    x = 596.05

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1.5x scale

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.