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Finding the Fourth Proportional to 1,315,573.80, 1,815,497.46 and 711,961.80

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Solution

The fourth proportional to 1,315,573.80, 1,815,497.46 and 711,961.80 is: 982,510.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315,573.80 : 1,815,497.46 = 711,961.80 : x
  2. Step 2: Convert to fraction form
    1,315,573.80/1,815,497.46 = 711,961.80/x
  3. Step 3: Cross multiply
    1,315,573.80x = 1,815,497.46 × 711,961.80
  4. Step 4: Simplify right side
    1,315,573.80x = 1,292,564,839,517.03
  5. Step 5: Solve for x
    x = 1,292,564,839,517.03/1,315,573.80
  6. Step 6: Final answer
    x = 982,510.32

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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.