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Finding the Fourth Proportional to 570,556.56, 787,377.72 and 312,429.36

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Solution

The fourth proportional to 570,556.56, 787,377.72 and 312,429.36 is: 431,157.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,556.56 : 787,377.72 = 312,429.36 : x
  2. Step 2: Convert to fraction form
    570,556.56/787,377.72 = 312,429.36/x
  3. Step 3: Cross multiply
    570,556.56x = 787,377.72 × 312,429.36
  4. Step 4: Simplify right side
    570,556.56x = 245,999,917,137.86
  5. Step 5: Solve for x
    x = 245,999,917,137.86/570,556.56
  6. Step 6: Final answer
    x = 431,157.81

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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.