Home / 1,187,586.24-1,638,690.72-678,180.80

Finding the Fourth Proportional to 1,187,586.24, 1,638,690.72 and 678,180.80

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Solution

The fourth proportional to 1,187,586.24, 1,638,690.72 and 678,180.80 is: 935,787.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,586.24 : 1,638,690.72 = 678,180.80 : x
  2. Step 2: Convert to fraction form
    1,187,586.24/1,638,690.72 = 678,180.80/x
  3. Step 3: Cross multiply
    1,187,586.24x = 1,638,690.72 × 678,180.80
  4. Step 4: Simplify right side
    1,187,586.24x = 1,111,328,583,442.18
  5. Step 5: Solve for x
    x = 1,111,328,583,442.18/1,187,586.24
  6. Step 6: Final answer
    x = 935,787.69

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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.