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Finding the Fourth Proportional to 1,309.98, 1,965.03 and 1,246.93

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Solution

The fourth proportional to 1,309.98, 1,965.03 and 1,246.93 is: 1,870.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,309.98 : 1,965.03 = 1,246.93 : x
  2. Step 2: Convert to fraction form
    1,309.98/1,965.03 = 1,246.93/x
  3. Step 3: Cross multiply
    1,309.98x = 1,965.03 × 1,246.93
  4. Step 4: Simplify right side
    1,309.98x = 2,450,254.86
  5. Step 5: Solve for x
    x = 2,450,254.86/1,309.98
  6. Step 6: Final answer
    x = 1,870.45

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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.