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Finding the Fourth Proportional to 1,022.49, 1,411.00 and 580.39

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Solution

The fourth proportional to 1,022.49, 1,411.00 and 580.39 is: 800.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,022.49 : 1,411.00 = 580.39 : x
  2. Step 2: Convert to fraction form
    1,022.49/1,411.00 = 580.39/x
  3. Step 3: Cross multiply
    1,022.49x = 1,411.00 × 580.39
  4. Step 4: Simplify right side
    1,022.49x = 818,925.31
  5. Step 5: Solve for x
    x = 818,925.31/1,022.49
  6. Step 6: Final answer
    x = 800.91

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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.