Home / 1,216,643.80-1,678,979.31-672,816.18

Finding the Fourth Proportional to 1,216,643.80, 1,678,979.31 and 672,816.18

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Solution

The fourth proportional to 1,216,643.80, 1,678,979.31 and 672,816.18 is: 928,492.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,216,643.80 : 1,678,979.31 = 672,816.18 : x
  2. Step 2: Convert to fraction form
    1,216,643.80/1,678,979.31 = 672,816.18/x
  3. Step 3: Cross multiply
    1,216,643.80x = 1,678,979.31 × 672,816.18
  4. Step 4: Simplify right side
    1,216,643.80x = 1,129,644,445,653.24
  5. Step 5: Solve for x
    x = 1,129,644,445,653.24/1,216,643.80
  6. Step 6: Final answer
    x = 928,492.34

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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.