Home / 491,199,870.02-678,161,737.41-312,684,483.36

Finding the Fourth Proportional to 491,199,870.02, 678,161,737.41 and 312,684,483.36

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Solution

The fourth proportional to 491,199,870.02, 678,161,737.41 and 312,684,483.36 is: 431,699,325.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,199,870.02 : 678,161,737.41 = 312,684,483.36 : x
  2. Step 2: Convert to fraction form
    491,199,870.02/678,161,737.41 = 312,684,483.36/x
  3. Step 3: Cross multiply
    491,199,870.02x = 678,161,737.41 × 312,684,483.36
  4. Step 4: Simplify right side
    491,199,870.02x = 212,050,652,496,565,824
  5. Step 5: Solve for x
    x = 212,050,652,496,565,824/491,199,870.02
  6. Step 6: Final answer
    x = 431,699,325.34

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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.