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Finding the Fourth Proportional to 628.09, 942.13 and 340.09

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Solution

The fourth proportional to 628.09, 942.13 and 340.09 is: 510.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.09 : 942.13 = 340.09 : x
  2. Step 2: Convert to fraction form
    628.09/942.13 = 340.09/x
  3. Step 3: Cross multiply
    628.09x = 942.13 × 340.09
  4. Step 4: Simplify right side
    628.09x = 320,404.28
  5. Step 5: Solve for x
    x = 320,404.28/628.09
  6. Step 6: Final answer
    x = 510.13

Related Problems

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Half scale
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Double scale
Find fourth proportional to 629.09, 943.63 and 341.09
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.