Home / 913,917.18-1,261,205.55-511,509.18

Finding the Fourth Proportional to 913,917.18, 1,261,205.55 and 511,509.18

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Solution

The fourth proportional to 913,917.18, 1,261,205.55 and 511,509.18 is: 705,882.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    913,917.18 : 1,261,205.55 = 511,509.18 : x
  2. Step 2: Convert to fraction form
    913,917.18/1,261,205.55 = 511,509.18/x
  3. Step 3: Cross multiply
    913,917.18x = 1,261,205.55 × 511,509.18
  4. Step 4: Simplify right side
    913,917.18x = 645,118,216,691.95
  5. Step 5: Solve for x
    x = 645,118,216,691.95/913,917.18
  6. Step 6: Final answer
    x = 705,882.58

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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.