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Finding the Fourth Proportional to 1,315,648.89, 1,815,647.63 and 742,708.89

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Solution

The fourth proportional to 1,315,648.89, 1,815,647.63 and 742,708.89 is: 1,024,967.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315,648.89 : 1,815,647.63 = 742,708.89 : x
  2. Step 2: Convert to fraction form
    1,315,648.89/1,815,647.63 = 742,708.89/x
  3. Step 3: Cross multiply
    1,315,648.89x = 1,815,647.63 × 742,708.89
  4. Step 4: Simplify right side
    1,315,648.89x = 1,348,497,632,194.89
  5. Step 5: Solve for x
    x = 1,348,497,632,194.89/1,315,648.89
  6. Step 6: Final answer
    x = 1,024,967.71

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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.