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Finding the Fourth Proportional to 440.16, 603.78 and 431.05

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Solution

The fourth proportional to 440.16, 603.78 and 431.05 is: 591.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.16 : 603.78 = 431.05 : x
  2. Step 2: Convert to fraction form
    440.16/603.78 = 431.05/x
  3. Step 3: Cross multiply
    440.16x = 603.78 × 431.05
  4. Step 4: Simplify right side
    440.16x = 260,259.37
  5. Step 5: Solve for x
    x = 260,259.37/440.16
  6. Step 6: Final answer
    x = 591.28

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.