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Finding the Fourth Proportional to 1,987,054.83, 2,742,493.53 and 1,171,210.89

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Solution

The fourth proportional to 1,987,054.83, 2,742,493.53 and 1,171,210.89 is: 1,616,481.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,987,054.83 : 2,742,493.53 = 1,171,210.89 : x
  2. Step 2: Convert to fraction form
    1,987,054.83/2,742,493.53 = 1,171,210.89/x
  3. Step 3: Cross multiply
    1,987,054.83x = 2,742,493.53 × 1,171,210.89
  4. Step 4: Simplify right side
    1,987,054.83x = 3,212,038,288,090.54
  5. Step 5: Solve for x
    x = 3,212,038,288,090.54/1,987,054.83
  6. Step 6: Final answer
    x = 1,616,481.96

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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.