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Finding the Fourth Proportional to 777,347.22, 1,072,168.14 and 515,228.48

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Solution

The fourth proportional to 777,347.22, 1,072,168.14 and 515,228.48 is: 710,636.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    777,347.22 : 1,072,168.14 = 515,228.48 : x
  2. Step 2: Convert to fraction form
    777,347.22/1,072,168.14 = 515,228.48/x
  3. Step 3: Cross multiply
    777,347.22x = 1,072,168.14 × 515,228.48
  4. Step 4: Simplify right side
    777,347.22x = 552,411,557,647.89
  5. Step 5: Solve for x
    x = 552,411,557,647.89/777,347.22
  6. Step 6: Final answer
    x = 710,636.82

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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.