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Finding the Fourth Proportional to 485,871.94, 670,474.38 and 281,907.06

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Solution

The fourth proportional to 485,871.94, 670,474.38 and 281,907.06 is: 389,014.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,871.94 : 670,474.38 = 281,907.06 : x
  2. Step 2: Convert to fraction form
    485,871.94/670,474.38 = 281,907.06/x
  3. Step 3: Cross multiply
    485,871.94x = 670,474.38 × 281,907.06
  4. Step 4: Simplify right side
    485,871.94x = 189,011,461,271.12
  5. Step 5: Solve for x
    x = 189,011,461,271.12/485,871.94
  6. Step 6: Final answer
    x = 389,014.98

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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.