Home / 687,290.78-1,030,521.86-308,142.95

Finding the Fourth Proportional to 687,290.78, 1,030,521.86 and 308,142.95

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Solution

The fourth proportional to 687,290.78, 1,030,521.86 and 308,142.95 is: 462,028.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,290.78 : 1,030,521.86 = 308,142.95 : x
  2. Step 2: Convert to fraction form
    687,290.78/1,030,521.86 = 308,142.95/x
  3. Step 3: Cross multiply
    687,290.78x = 1,030,521.86 × 308,142.95
  4. Step 4: Simplify right side
    687,290.78x = 317,548,040,442.10
  5. Step 5: Solve for x
    x = 317,548,040,442.10/687,290.78
  6. Step 6: Final answer
    x = 462,028.66

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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.