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Finding the Fourth Proportional to 708,799.63, 978,107.98 and 402,835.59

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Solution

The fourth proportional to 708,799.63, 978,107.98 and 402,835.59 is: 555,892.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,799.63 : 978,107.98 = 402,835.59 : x
  2. Step 2: Convert to fraction form
    708,799.63/978,107.98 = 402,835.59/x
  3. Step 3: Cross multiply
    708,799.63x = 978,107.98 × 402,835.59
  4. Step 4: Simplify right side
    708,799.63x = 394,016,705,207.01
  5. Step 5: Solve for x
    x = 394,016,705,207.01/708,799.63
  6. Step 6: Final answer
    x = 555,892.93

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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.