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Finding the Fourth Proportional to 1,787,978.93, 2,467,441.73 and 972,188.11

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Solution

The fourth proportional to 1,787,978.93, 2,467,441.73 and 972,188.11 is: 1,341,636.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,787,978.93 : 2,467,441.73 = 972,188.11 : x
  2. Step 2: Convert to fraction form
    1,787,978.93/2,467,441.73 = 972,188.11/x
  3. Step 3: Cross multiply
    1,787,978.93x = 2,467,441.73 × 972,188.11
  4. Step 4: Simplify right side
    1,787,978.93x = 2,398,817,512,023.83
  5. Step 5: Solve for x
    x = 2,398,817,512,023.83/1,787,978.93
  6. Step 6: Final answer
    x = 1,341,636.35

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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.