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Finding the Fourth Proportional to 704,799.94, 972,623.53 and 398,870.77

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Solution

The fourth proportional to 704,799.94, 972,623.53 and 398,870.77 is: 550,441.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    704,799.94 : 972,623.53 = 398,870.77 : x
  2. Step 2: Convert to fraction form
    704,799.94/972,623.53 = 398,870.77/x
  3. Step 3: Cross multiply
    704,799.94x = 972,623.53 × 398,870.77
  4. Step 4: Simplify right side
    704,799.94x = 387,951,096,331.22
  5. Step 5: Solve for x
    x = 387,951,096,331.22/704,799.94
  6. Step 6: Final answer
    x = 550,441.44

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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.