Home / 491,199,870.77-678,161,738.45-312,684,484.11

Finding the Fourth Proportional to 491,199,870.77, 678,161,738.45 and 312,684,484.11

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Solution

The fourth proportional to 491,199,870.77, 678,161,738.45 and 312,684,484.11 is: 431,699,326.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,199,870.77 : 678,161,738.45 = 312,684,484.11 : x
  2. Step 2: Convert to fraction form
    491,199,870.77/678,161,738.45 = 312,684,484.11/x
  3. Step 3: Cross multiply
    491,199,870.77x = 678,161,738.45 × 312,684,484.11
  4. Step 4: Simplify right side
    491,199,870.77x = 212,050,653,328,815,616
  5. Step 5: Solve for x
    x = 212,050,653,328,815,616/491,199,870.77
  6. Step 6: Final answer
    x = 431,699,326.38

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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.