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Finding the Fourth Proportional to 1,295,743.07, 1,788,128.31 and 722,820.35

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Solution

The fourth proportional to 1,295,743.07, 1,788,128.31 and 722,820.35 is: 997,493.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,295,743.07 : 1,788,128.31 = 722,820.35 : x
  2. Step 2: Convert to fraction form
    1,295,743.07/1,788,128.31 = 722,820.35/x
  3. Step 3: Cross multiply
    1,295,743.07x = 1,788,128.31 × 722,820.35
  4. Step 4: Simplify right side
    1,295,743.07x = 1,292,495,521,938.47
  5. Step 5: Solve for x
    x = 1,292,495,521,938.47/1,295,743.07
  6. Step 6: Final answer
    x = 997,493.68

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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.