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Finding the Fourth Proportional to 805,978.76, 1,207,971.64 and 406,733.72

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Solution

The fourth proportional to 805,978.76, 1,207,971.64 and 406,733.72 is: 609,597.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    805,978.76 : 1,207,971.64 = 406,733.72 : x
  2. Step 2: Convert to fraction form
    805,978.76/1,207,971.64 = 406,733.72/x
  3. Step 3: Cross multiply
    805,978.76x = 1,207,971.64 × 406,733.72
  4. Step 4: Simplify right side
    805,978.76x = 491,322,798,791.70
  5. Step 5: Solve for x
    x = 491,322,798,791.70/805,978.76
  6. Step 6: Final answer
    x = 609,597.70

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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.