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Finding the Fourth Proportional to 1,273,566.67, 1,758,508.65 and 978,749.55

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Solution

The fourth proportional to 1,273,566.67, 1,758,508.65 and 978,749.55 is: 1,351,432.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,273,566.67 : 1,758,508.65 = 978,749.55 : x
  2. Step 2: Convert to fraction form
    1,273,566.67/1,758,508.65 = 978,749.55/x
  3. Step 3: Cross multiply
    1,273,566.67x = 1,758,508.65 × 978,749.55
  4. Step 4: Simplify right side
    1,273,566.67x = 1,721,139,549,858.61
  5. Step 5: Solve for x
    x = 1,721,139,549,858.61/1,273,566.67
  6. Step 6: Final answer
    x = 1,351,432.63

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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.