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Finding the Fourth Proportional to 1,174,784.88, 1,621,148.40 and 665,491.44

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Solution

The fourth proportional to 1,174,784.88, 1,621,148.40 and 665,491.44 is: 918,347.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,174,784.88 : 1,621,148.40 = 665,491.44 : x
  2. Step 2: Convert to fraction form
    1,174,784.88/1,621,148.40 = 665,491.44/x
  3. Step 3: Cross multiply
    1,174,784.88x = 1,621,148.40 × 665,491.44
  4. Step 4: Simplify right side
    1,174,784.88x = 1,078,860,383,169.70
  5. Step 5: Solve for x
    x = 1,078,860,383,169.70/1,174,784.88
  6. Step 6: Final answer
    x = 918,347.18

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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.