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Finding the Fourth Proportional to 708,850.70, 978,238.32 and 402,939.92

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Solution

The fourth proportional to 708,850.70, 978,238.32 and 402,939.92 is: 556,070.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,850.70 : 978,238.32 = 402,939.92 : x
  2. Step 2: Convert to fraction form
    708,850.70/978,238.32 = 402,939.92/x
  3. Step 3: Cross multiply
    708,850.70x = 978,238.32 × 402,939.92
  4. Step 4: Simplify right side
    708,850.70x = 394,171,270,401.73
  5. Step 5: Solve for x
    x = 394,171,270,401.73/708,850.70
  6. Step 6: Final answer
    x = 556,070.93

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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.