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Finding the Fourth Proportional to 252,256.40, 378,557.40 and 139,936.40

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Solution

The fourth proportional to 252,256.40, 378,557.40 and 139,936.40 is: 210,000.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    252,256.40 : 378,557.40 = 139,936.40 : x
  2. Step 2: Convert to fraction form
    252,256.40/378,557.40 = 139,936.40/x
  3. Step 3: Cross multiply
    252,256.40x = 378,557.40 × 139,936.40
  4. Step 4: Simplify right side
    252,256.40x = 52,973,959,749.36
  5. Step 5: Solve for x
    x = 52,973,959,749.36/252,256.40
  6. Step 6: Final answer
    x = 210,000.46

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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.