Home / 688,021.90-1,029,991.65-511,312.30

Finding the Fourth Proportional to 688,021.90, 1,029,991.65 and 511,312.30

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Solution

The fourth proportional to 688,021.90, 1,029,991.65 and 511,312.30 is: 765,451.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,021.90 : 1,029,991.65 = 511,312.30 : x
  2. Step 2: Convert to fraction form
    688,021.90/1,029,991.65 = 511,312.30/x
  3. Step 3: Cross multiply
    688,021.90x = 1,029,991.65 × 511,312.30
  4. Step 4: Simplify right side
    688,021.90x = 526,647,399,542.30
  5. Step 5: Solve for x
    x = 526,647,399,542.30/688,021.90
  6. Step 6: Final answer
    x = 765,451.51

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1.5x scale

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.