Home / 428,561.94-642,848.38-295,406.45

Finding the Fourth Proportional to 428,561.94, 642,848.38 and 295,406.45

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Solution

The fourth proportional to 428,561.94, 642,848.38 and 295,406.45 is: 443,113.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,561.94 : 642,848.38 = 295,406.45 : x
  2. Step 2: Convert to fraction form
    428,561.94/642,848.38 = 295,406.45/x
  3. Step 3: Cross multiply
    428,561.94x = 642,848.38 × 295,406.45
  4. Step 4: Simplify right side
    428,561.94x = 189,901,557,943.64
  5. Step 5: Solve for x
    x = 189,901,557,943.64/428,561.94
  6. Step 6: Final answer
    x = 443,113.44

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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.