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Finding the Fourth Proportional to 1,043.49, 1,440.01 and 571.40

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Solution

The fourth proportional to 1,043.49, 1,440.01 and 571.40 is: 788.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,043.49 : 1,440.01 = 571.40 : x
  2. Step 2: Convert to fraction form
    1,043.49/1,440.01 = 571.40/x
  3. Step 3: Cross multiply
    1,043.49x = 1,440.01 × 571.40
  4. Step 4: Simplify right side
    1,043.49x = 822,821.71
  5. Step 5: Solve for x
    x = 822,821.71/1,043.49
  6. Step 6: Final answer
    x = 788.53

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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.