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Finding the Fourth Proportional to 1,752,621.80, 2,628,932.70 and 687,698.60

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Solution

The fourth proportional to 1,752,621.80, 2,628,932.70 and 687,698.60 is: 1,031,547.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,752,621.80 : 2,628,932.70 = 687,698.60 : x
  2. Step 2: Convert to fraction form
    1,752,621.80/2,628,932.70 = 687,698.60/x
  3. Step 3: Cross multiply
    1,752,621.80x = 2,628,932.70 × 687,698.60
  4. Step 4: Simplify right side
    1,752,621.80x = 1,807,913,337,284.22
  5. Step 5: Solve for x
    x = 1,807,913,337,284.22/1,752,621.80
  6. Step 6: Final answer
    x = 1,031,547.90

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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.