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Finding the Fourth Proportional to 607.38, 838.26 and 345.48

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Solution

The fourth proportional to 607.38, 838.26 and 345.48 is: 476.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    607.38 : 838.26 = 345.48 : x
  2. Step 2: Convert to fraction form
    607.38/838.26 = 345.48/x
  3. Step 3: Cross multiply
    607.38x = 838.26 × 345.48
  4. Step 4: Simplify right side
    607.38x = 289,602.06
  5. Step 5: Solve for x
    x = 289,602.06/607.38
  6. Step 6: Final answer
    x = 476.81

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Double scale
Find fourth proportional to 608.38, 839.64 and 346.48
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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.