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Finding the Fourth Proportional to 704,858.96, 972,719.87 and 398,935.32

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Solution

The fourth proportional to 704,858.96, 972,719.87 and 398,935.32 is: 550,538.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    704,858.96 : 972,719.87 = 398,935.32 : x
  2. Step 2: Convert to fraction form
    704,858.96/972,719.87 = 398,935.32/x
  3. Step 3: Cross multiply
    704,858.96x = 972,719.87 × 398,935.32
  4. Step 4: Simplify right side
    704,858.96x = 388,052,312,608.81
  5. Step 5: Solve for x
    x = 388,052,312,608.81/704,858.96
  6. Step 6: Final answer
    x = 550,538.95

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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.