Home / 1,288,628.21-1,778,311.08-715,668.38

Finding the Fourth Proportional to 1,288,628.21, 1,778,311.08 and 715,668.38

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Solution

The fourth proportional to 1,288,628.21, 1,778,311.08 and 715,668.38 is: 987,624.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288,628.21 : 1,778,311.08 = 715,668.38 : x
  2. Step 2: Convert to fraction form
    1,288,628.21/1,778,311.08 = 715,668.38/x
  3. Step 3: Cross multiply
    1,288,628.21x = 1,778,311.08 × 715,668.38
  4. Step 4: Simplify right side
    1,288,628.21x = 1,272,681,009,759.65
  5. Step 5: Solve for x
    x = 1,272,681,009,759.65/1,288,628.21
  6. Step 6: Final answer
    x = 987,624.67

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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.