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Finding the Fourth Proportional to 1,412.19, 1,948.37 and 822.51

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Solution

The fourth proportional to 1,412.19, 1,948.37 and 822.51 is: 1,134.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,412.19 : 1,948.37 = 822.51 : x
  2. Step 2: Convert to fraction form
    1,412.19/1,948.37 = 822.51/x
  3. Step 3: Cross multiply
    1,412.19x = 1,948.37 × 822.51
  4. Step 4: Simplify right side
    1,412.19x = 1,602,549.70
  5. Step 5: Solve for x
    x = 1,602,549.70/1,412.19
  6. Step 6: Final answer
    x = 1,134.80

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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.