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Finding the Fourth Proportional to 1,270,738.80, 1,753,505.28 and 697,766.40

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Solution

The fourth proportional to 1,270,738.80, 1,753,505.28 and 697,766.40 is: 962,854.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,270,738.80 : 1,753,505.28 = 697,766.40 : x
  2. Step 2: Convert to fraction form
    1,270,738.80/1,753,505.28 = 697,766.40/x
  3. Step 3: Cross multiply
    1,270,738.80x = 1,753,505.28 × 697,766.40
  4. Step 4: Simplify right side
    1,270,738.80x = 1,223,537,066,606.59
  5. Step 5: Solve for x
    x = 1,223,537,066,606.59/1,270,738.80
  6. Step 6: Final answer
    x = 962,854.89

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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.