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Finding the Fourth Proportional to 1,431,699.78, 1,975,746.96 and 787,130.94

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Solution

The fourth proportional to 1,431,699.78, 1,975,746.96 and 787,130.94 is: 1,086,241.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,431,699.78 : 1,975,746.96 = 787,130.94 : x
  2. Step 2: Convert to fraction form
    1,431,699.78/1,975,746.96 = 787,130.94/x
  3. Step 3: Cross multiply
    1,431,699.78x = 1,975,746.96 × 787,130.94
  4. Step 4: Simplify right side
    1,431,699.78x = 1,555,171,561,826.94
  5. Step 5: Solve for x
    x = 1,555,171,561,826.94/1,431,699.78
  6. Step 6: Final answer
    x = 1,086,241.39

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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.