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Finding the Fourth Proportional to 1,294,670.37, 1,786,855.56 and 778,945.53

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Solution

The fourth proportional to 1,294,670.37, 1,786,855.56 and 778,945.53 is: 1,075,071.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,294,670.37 : 1,786,855.56 = 778,945.53 : x
  2. Step 2: Convert to fraction form
    1,294,670.37/1,786,855.56 = 778,945.53/x
  3. Step 3: Cross multiply
    1,294,670.37x = 1,786,855.56 × 778,945.53
  4. Step 4: Simplify right side
    1,294,670.37x = 1,391,863,151,217.65
  5. Step 5: Solve for x
    x = 1,391,863,151,217.65/1,294,670.37
  6. Step 6: Final answer
    x = 1,075,071.45

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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.