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Finding the Fourth Proportional to 486.77, 670.10 and 440.00

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Solution

The fourth proportional to 486.77, 670.10 and 440.00 is: 605.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.77 : 670.10 = 440.00 : x
  2. Step 2: Convert to fraction form
    486.77/670.10 = 440.00/x
  3. Step 3: Cross multiply
    486.77x = 670.10 × 440.00
  4. Step 4: Simplify right side
    486.77x = 294,840.96
  5. Step 5: Solve for x
    x = 294,840.96/486.77
  6. Step 6: Final answer
    x = 605.72

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Find fourth proportional to 243.38, 335.05 and 220.00
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Double scale
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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.