Home / 688,511.40-1,030,725.90-511,801.80

Finding the Fourth Proportional to 688,511.40, 1,030,725.90 and 511,801.80

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Solution

The fourth proportional to 688,511.40, 1,030,725.90 and 511,801.80 is: 766,185.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,511.40 : 1,030,725.90 = 511,801.80 : x
  2. Step 2: Convert to fraction form
    688,511.40/1,030,725.90 = 511,801.80/x
  3. Step 3: Cross multiply
    688,511.40x = 1,030,725.90 × 511,801.80
  4. Step 4: Simplify right side
    688,511.40x = 527,527,370,926.62
  5. Step 5: Solve for x
    x = 527,527,370,926.62/688,511.40
  6. Step 6: Final answer
    x = 766,185.38

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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.