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Finding the Fourth Proportional to 571,679.34, 788,860.59 and 330,039.90

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Solution

The fourth proportional to 571,679.34, 788,860.59 and 330,039.90 is: 455,422.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,679.34 : 788,860.59 = 330,039.90 : x
  2. Step 2: Convert to fraction form
    571,679.34/788,860.59 = 330,039.90/x
  3. Step 3: Cross multiply
    571,679.34x = 788,860.59 × 330,039.90
  4. Step 4: Simplify right side
    571,679.34x = 260,355,470,237.54
  5. Step 5: Solve for x
    x = 260,355,470,237.54/571,679.34
  6. Step 6: Final answer
    x = 455,422.21

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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.