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Finding the Fourth Proportional to 1,212,869.70, 1,819,304.55 and 740,477.70

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Solution

The fourth proportional to 1,212,869.70, 1,819,304.55 and 740,477.70 is: 1,110,716.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,212,869.70 : 1,819,304.55 = 740,477.70 : x
  2. Step 2: Convert to fraction form
    1,212,869.70/1,819,304.55 = 740,477.70/x
  3. Step 3: Cross multiply
    1,212,869.70x = 1,819,304.55 × 740,477.70
  4. Step 4: Simplify right side
    1,212,869.70x = 1,347,154,448,783.53
  5. Step 5: Solve for x
    x = 1,347,154,448,783.53/1,212,869.70
  6. Step 6: Final answer
    x = 1,110,716.55

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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.