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Finding the Fourth Proportional to 318,075.75, 476,992.42 and 140,485.88

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Solution

The fourth proportional to 318,075.75, 476,992.42 and 140,485.88 is: 210,675.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,075.75 : 476,992.42 = 140,485.88 : x
  2. Step 2: Convert to fraction form
    318,075.75/476,992.42 = 140,485.88/x
  3. Step 3: Cross multiply
    318,075.75x = 476,992.42 × 140,485.88
  4. Step 4: Simplify right side
    318,075.75x = 67,010,700,718.30
  5. Step 5: Solve for x
    x = 67,010,700,718.30/318,075.75
  6. Step 6: Final answer
    x = 210,675.29

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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.