Home / 1,288,730.82-1,778,399.10-715,807.56

Finding the Fourth Proportional to 1,288,730.82, 1,778,399.10 and 715,807.56

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Solution

The fourth proportional to 1,288,730.82, 1,778,399.10 and 715,807.56 is: 987,786.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288,730.82 : 1,778,399.10 = 715,807.56 : x
  2. Step 2: Convert to fraction form
    1,288,730.82/1,778,399.10 = 715,807.56/x
  3. Step 3: Cross multiply
    1,288,730.82x = 1,778,399.10 × 715,807.56
  4. Step 4: Simplify right side
    1,288,730.82x = 1,272,991,520,477.20
  5. Step 5: Solve for x
    x = 1,272,991,520,477.20/1,288,730.82
  6. Step 6: Final answer
    x = 987,786.98

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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.