Home / 781,654.89-1,077,827.16-509,217.56

Finding the Fourth Proportional to 781,654.89, 1,077,827.16 and 509,217.56

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Solution

The fourth proportional to 781,654.89, 1,077,827.16 and 509,217.56 is: 702,162.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    781,654.89 : 1,077,827.16 = 509,217.56 : x
  2. Step 2: Convert to fraction form
    781,654.89/1,077,827.16 = 509,217.56/x
  3. Step 3: Cross multiply
    781,654.89x = 1,077,827.16 × 509,217.56
  4. Step 4: Simplify right side
    781,654.89x = 548,848,520,166.28
  5. Step 5: Solve for x
    x = 548,848,520,166.28/781,654.89
  6. Step 6: Final answer
    x = 702,162.21

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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.