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Finding the Fourth Proportional to 1,752,623.80, 2,628,935.70 and 687,700.60

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Solution

The fourth proportional to 1,752,623.80, 2,628,935.70 and 687,700.60 is: 1,031,550.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,752,623.80 : 2,628,935.70 = 687,700.60 : x
  2. Step 2: Convert to fraction form
    1,752,623.80/2,628,935.70 = 687,700.60/x
  3. Step 3: Cross multiply
    1,752,623.80x = 2,628,935.70 × 687,700.60
  4. Step 4: Simplify right side
    1,752,623.80x = 1,807,920,658,251.42
  5. Step 5: Solve for x
    x = 1,807,920,658,251.42/1,752,623.80
  6. Step 6: Final answer
    x = 1,031,550.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.