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Finding the Fourth Proportional to 1,413.58, 1,950.64 and 784.08

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Solution

The fourth proportional to 1,413.58, 1,950.64 and 784.08 is: 1,081.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,413.58 : 1,950.64 = 784.08 : x
  2. Step 2: Convert to fraction form
    1,413.58/1,950.64 = 784.08/x
  3. Step 3: Cross multiply
    1,413.58x = 1,950.64 × 784.08
  4. Step 4: Simplify right side
    1,413.58x = 1,529,457.81
  5. Step 5: Solve for x
    x = 1,529,457.81/1,413.58
  6. Step 6: Final answer
    x = 1,081.98

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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.