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Finding the Fourth Proportional to 476.76, 656.91 and 345.54

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Solution

The fourth proportional to 476.76, 656.91 and 345.54 is: 476.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    476.76 : 656.91 = 345.54 : x
  2. Step 2: Convert to fraction form
    476.76/656.91 = 345.54/x
  3. Step 3: Cross multiply
    476.76x = 656.91 × 345.54
  4. Step 4: Simplify right side
    476.76x = 226,988.68
  5. Step 5: Solve for x
    x = 226,988.68/476.76
  6. Step 6: Final answer
    x = 476.11

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Find fourth proportional to 238.38, 328.46 and 172.77
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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.