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Finding the Fourth Proportional to 539.06, 808.59 and 430.34

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Solution

The fourth proportional to 539.06, 808.59 and 430.34 is: 645.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.06 : 808.59 = 430.34 : x
  2. Step 2: Convert to fraction form
    539.06/808.59 = 430.34/x
  3. Step 3: Cross multiply
    539.06x = 808.59 × 430.34
  4. Step 4: Simplify right side
    539.06x = 347,968.62
  5. Step 5: Solve for x
    x = 347,968.62/539.06
  6. Step 6: Final answer
    x = 645.51

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Double scale
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Similar ratio
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1.5x scale

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.