Home / 502,786.20-693,647.40-287,810.52

Finding the Fourth Proportional to 502,786.20, 693,647.40 and 287,810.52

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Solution

The fourth proportional to 502,786.20, 693,647.40 and 287,810.52 is: 397,065.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    502,786.20 : 693,647.40 = 287,810.52 : x
  2. Step 2: Convert to fraction form
    502,786.20/693,647.40 = 287,810.52/x
  3. Step 3: Cross multiply
    502,786.20x = 693,647.40 × 287,810.52
  4. Step 4: Simplify right side
    502,786.20x = 199,639,018,890.65
  5. Step 5: Solve for x
    x = 199,639,018,890.65/502,786.20
  6. Step 6: Final answer
    x = 397,065.43

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1.5x scale

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.