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Finding the Fourth Proportional to 947,978.80, 1,308,215.36 and 518,258.92

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Solution

The fourth proportional to 947,978.80, 1,308,215.36 and 518,258.92 is: 715,199.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    947,978.80 : 1,308,215.36 = 518,258.92 : x
  2. Step 2: Convert to fraction form
    947,978.80/1,308,215.36 = 518,258.92/x
  3. Step 3: Cross multiply
    947,978.80x = 1,308,215.36 × 518,258.92
  4. Step 4: Simplify right side
    947,978.80x = 677,994,279,601.01
  5. Step 5: Solve for x
    x = 677,994,279,601.01/947,978.80
  6. Step 6: Final answer
    x = 715,199.83

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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.