Home / 1,638,678.86-2,261,155.05-913,491.53

Finding the Fourth Proportional to 1,638,678.86, 2,261,155.05 and 913,491.53

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Solution

The fourth proportional to 1,638,678.86, 2,261,155.05 and 913,491.53 is: 1,260,494.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638,678.86 : 2,261,155.05 = 913,491.53 : x
  2. Step 2: Convert to fraction form
    1,638,678.86/2,261,155.05 = 913,491.53/x
  3. Step 3: Cross multiply
    1,638,678.86x = 2,261,155.05 × 913,491.53
  4. Step 4: Simplify right side
    1,638,678.86x = 2,065,545,986,191.73
  5. Step 5: Solve for x
    x = 2,065,545,986,191.73/1,638,678.86
  6. Step 6: Final answer
    x = 1,260,494.68

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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.