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Finding the Fourth Proportional to 571,278.60, 856,992.42 and 211,400.46

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Solution

The fourth proportional to 571,278.60, 856,992.42 and 211,400.46 is: 317,128.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,278.60 : 856,992.42 = 211,400.46 : x
  2. Step 2: Convert to fraction form
    571,278.60/856,992.42 = 211,400.46/x
  3. Step 3: Cross multiply
    571,278.60x = 856,992.42 × 211,400.46
  4. Step 4: Simplify right side
    571,278.60x = 181,168,591,804.51
  5. Step 5: Solve for x
    x = 181,168,591,804.51/571,278.60
  6. Step 6: Final answer
    x = 317,128.27

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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.