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Finding the Fourth Proportional to 651,569.56, 978,429.21 and 439,698.67

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Solution

The fourth proportional to 651,569.56, 978,429.21 and 439,698.67 is: 660,273.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,569.56 : 978,429.21 = 439,698.67 : x
  2. Step 2: Convert to fraction form
    651,569.56/978,429.21 = 439,698.67/x
  3. Step 3: Cross multiply
    651,569.56x = 978,429.21 × 439,698.67
  4. Step 4: Simplify right side
    651,569.56x = 430,214,022,326.15
  5. Step 5: Solve for x
    x = 430,214,022,326.15/651,569.56
  6. Step 6: Final answer
    x = 660,273.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.