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Finding the Fourth Proportional to 2,978,898.34, 4,110,879.54 and 1,620,781.06

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Solution

The fourth proportional to 2,978,898.34, 4,110,879.54 and 1,620,781.06 is: 2,236,677.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,978,898.34 : 4,110,879.54 = 1,620,781.06 : x
  2. Step 2: Convert to fraction form
    2,978,898.34/4,110,879.54 = 1,620,781.06/x
  3. Step 3: Cross multiply
    2,978,898.34x = 4,110,879.54 × 1,620,781.06
  4. Step 4: Simplify right side
    2,978,898.34x = 6,662,835,698,373.51
  5. Step 5: Solve for x
    x = 6,662,835,698,373.51/2,978,898.34
  6. Step 6: Final answer
    x = 2,236,677.77

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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.