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Finding the Fourth Proportional to 708,741.60, 978,146.36 and 402,863.92

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Solution

The fourth proportional to 708,741.60, 978,146.36 and 402,863.92 is: 555,999.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,741.60 : 978,146.36 = 402,863.92 : x
  2. Step 2: Convert to fraction form
    708,741.60/978,146.36 = 402,863.92/x
  3. Step 3: Cross multiply
    708,741.60x = 978,146.36 × 402,863.92
  4. Step 4: Simplify right side
    708,741.60x = 394,059,876,923.33
  5. Step 5: Solve for x
    x = 394,059,876,923.33/708,741.60
  6. Step 6: Final answer
    x = 555,999.36

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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.