Home / 485,668,950.12-670,261,760.46-309,536,018.28

Finding the Fourth Proportional to 485,668,950.12, 670,261,760.46 and 309,536,018.28

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Solution

The fourth proportional to 485,668,950.12, 670,261,760.46 and 309,536,018.28 is: 427,184,312.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,668,950.12 : 670,261,760.46 = 309,536,018.28 : x
  2. Step 2: Convert to fraction form
    485,668,950.12/670,261,760.46 = 309,536,018.28/x
  3. Step 3: Cross multiply
    485,668,950.12x = 670,261,760.46 × 309,536,018.28
  4. Step 4: Simplify right side
    485,668,950.12x = 207,470,156,538,131,520
  5. Step 5: Solve for x
    x = 207,470,156,538,131,520/485,668,950.12
  6. Step 6: Final answer
    x = 427,184,312.46

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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.