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Finding the Fourth Proportional to 310,749.36, 428,820.36 and 190,093.20

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Solution

The fourth proportional to 310,749.36, 428,820.36 and 190,093.20 is: 262,320.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,749.36 : 428,820.36 = 190,093.20 : x
  2. Step 2: Convert to fraction form
    310,749.36/428,820.36 = 190,093.20/x
  3. Step 3: Cross multiply
    310,749.36x = 428,820.36 × 190,093.20
  4. Step 4: Simplify right side
    310,749.36x = 81,515,834,457.55
  5. Step 5: Solve for x
    x = 81,515,834,457.55/310,749.36
  6. Step 6: Final answer
    x = 262,320.20

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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.