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Finding the Fourth Proportional to 1,212,929.20, 1,819,393.80 and 740,537.20

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Solution

The fourth proportional to 1,212,929.20, 1,819,393.80 and 740,537.20 is: 1,110,805.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,212,929.20 : 1,819,393.80 = 740,537.20 : x
  2. Step 2: Convert to fraction form
    1,212,929.20/1,819,393.80 = 740,537.20/x
  3. Step 3: Cross multiply
    1,212,929.20x = 1,819,393.80 × 740,537.20
  4. Step 4: Simplify right side
    1,212,929.20x = 1,347,328,790,349.36
  5. Step 5: Solve for x
    x = 1,347,328,790,349.36/1,212,929.20
  6. Step 6: Final answer
    x = 1,110,805.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.