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Finding the Fourth Proportional to 1,413.65, 1,950.95 and 784.24

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Solution

The fourth proportional to 1,413.65, 1,950.95 and 784.24 is: 1,082.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,413.65 : 1,950.95 = 784.24 : x
  2. Step 2: Convert to fraction form
    1,413.65/1,950.95 = 784.24/x
  3. Step 3: Cross multiply
    1,413.65x = 1,950.95 × 784.24
  4. Step 4: Simplify right side
    1,413.65x = 1,530,013.03
  5. Step 5: Solve for x
    x = 1,530,013.03/1,413.65
  6. Step 6: Final answer
    x = 1,082.31

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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.