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Finding the Fourth Proportional to 750,709.34, 1,036,078.67 and 428,345.54

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Solution

The fourth proportional to 750,709.34, 1,036,078.67 and 428,345.54 is: 591,173.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    750,709.34 : 1,036,078.67 = 428,345.54 : x
  2. Step 2: Convert to fraction form
    750,709.34/1,036,078.67 = 428,345.54/x
  3. Step 3: Cross multiply
    750,709.34x = 1,036,078.67 × 428,345.54
  4. Step 4: Simplify right side
    750,709.34x = 443,799,675,241.90
  5. Step 5: Solve for x
    x = 443,799,675,241.90/750,709.34
  6. Step 6: Final answer
    x = 591,173.78

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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.