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Finding the Fourth Proportional to 665.80, 918.90 and 432.52

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Solution

The fourth proportional to 665.80, 918.90 and 432.52 is: 596.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.80 : 918.90 = 432.52 : x
  2. Step 2: Convert to fraction form
    665.80/918.90 = 432.52/x
  3. Step 3: Cross multiply
    665.80x = 918.90 × 432.52
  4. Step 4: Simplify right side
    665.80x = 397,442.63
  5. Step 5: Solve for x
    x = 397,442.63/665.80
  6. Step 6: Final answer
    x = 596.94

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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.