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Finding the Fourth Proportional to 607.15, 838.05 and 345.34

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Solution

The fourth proportional to 607.15, 838.05 and 345.34 is: 476.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    607.15 : 838.05 = 345.34 : x
  2. Step 2: Convert to fraction form
    607.15/838.05 = 345.34/x
  3. Step 3: Cross multiply
    607.15x = 838.05 × 345.34
  4. Step 4: Simplify right side
    607.15x = 289,412.19
  5. Step 5: Solve for x
    x = 289,412.19/607.15
  6. Step 6: Final answer
    x = 476.67

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Double scale
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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.