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Finding the Fourth Proportional to 668,943.66, 922,840.88 and 397,023.02

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Solution

The fourth proportional to 668,943.66, 922,840.88 and 397,023.02 is: 547,712.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,943.66 : 922,840.88 = 397,023.02 : x
  2. Step 2: Convert to fraction form
    668,943.66/922,840.88 = 397,023.02/x
  3. Step 3: Cross multiply
    668,943.66x = 922,840.88 × 397,023.02
  4. Step 4: Simplify right side
    668,943.66x = 366,389,068,542.85
  5. Step 5: Solve for x
    x = 366,389,068,542.85/668,943.66
  6. Step 6: Final answer
    x = 547,712.89

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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.