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Finding the Fourth Proportional to 948.98, 1,424.48 and 839.99

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Solution

The fourth proportional to 948.98, 1,424.48 and 839.99 is: 1,260.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    948.98 : 1,424.48 = 839.99 : x
  2. Step 2: Convert to fraction form
    948.98/1,424.48 = 839.99/x
  3. Step 3: Cross multiply
    948.98x = 1,424.48 × 839.99
  4. Step 4: Simplify right side
    948.98x = 1,196,547.49
  5. Step 5: Solve for x
    x = 1,196,547.49/948.98
  6. Step 6: Final answer
    x = 1,260.87

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.