Home / 750,805.85-1,036,128.80-428,509.46

Finding the Fourth Proportional to 750,805.85, 1,036,128.80 and 428,509.46

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Solution

The fourth proportional to 750,805.85, 1,036,128.80 and 428,509.46 is: 591,352.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    750,805.85 : 1,036,128.80 = 428,509.46 : x
  2. Step 2: Convert to fraction form
    750,805.85/1,036,128.80 = 428,509.46/x
  3. Step 3: Cross multiply
    750,805.85x = 1,036,128.80 × 428,509.46
  4. Step 4: Simplify right side
    750,805.85x = 443,990,992,578.45
  5. Step 5: Solve for x
    x = 443,990,992,578.45/750,805.85
  6. Step 6: Final answer
    x = 591,352.60

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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.