Home / 1,288,841.12-1,778,601.28-715,934.72

Finding the Fourth Proportional to 1,288,841.12, 1,778,601.28 and 715,934.72

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Solution

The fourth proportional to 1,288,841.12, 1,778,601.28 and 715,934.72 is: 987,990.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288,841.12 : 1,778,601.28 = 715,934.72 : x
  2. Step 2: Convert to fraction form
    1,288,841.12/1,778,601.28 = 715,934.72/x
  3. Step 3: Cross multiply
    1,288,841.12x = 1,778,601.28 × 715,934.72
  4. Step 4: Simplify right side
    1,288,841.12x = 1,273,362,409,388.44
  5. Step 5: Solve for x
    x = 1,273,362,409,388.44/1,288,841.12
  6. Step 6: Final answer
    x = 987,990.21

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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.