Home / 1,022.80-1,411.40-630.08

Finding the Fourth Proportional to 1,022.80, 1,411.40 and 630.08

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Solution

The fourth proportional to 1,022.80, 1,411.40 and 630.08 is: 869.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,022.80 : 1,411.40 = 630.08 : x
  2. Step 2: Convert to fraction form
    1,022.80/1,411.40 = 630.08/x
  3. Step 3: Cross multiply
    1,022.80x = 1,411.40 × 630.08
  4. Step 4: Simplify right side
    1,022.80x = 889,294.91
  5. Step 5: Solve for x
    x = 889,294.91/1,022.80
  6. Step 6: Final answer
    x = 869.47

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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.