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Finding the Fourth Proportional to 985,765.86, 1,359,730.53 and 646,255.98

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Solution

The fourth proportional to 985,765.86, 1,359,730.53 and 646,255.98 is: 891,422.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    985,765.86 : 1,359,730.53 = 646,255.98 : x
  2. Step 2: Convert to fraction form
    985,765.86/1,359,730.53 = 646,255.98/x
  3. Step 3: Cross multiply
    985,765.86x = 1,359,730.53 × 646,255.98
  4. Step 4: Simplify right side
    985,765.86x = 878,733,986,201.07
  5. Step 5: Solve for x
    x = 878,733,986,201.07/985,765.86
  6. Step 6: Final answer
    x = 891,422.62

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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.