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Finding the Fourth Proportional to 658,134.60, 907,760.16 and 428,268.78

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Solution

The fourth proportional to 658,134.60, 907,760.16 and 428,268.78 is: 590,707.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,134.60 : 907,760.16 = 428,268.78 : x
  2. Step 2: Convert to fraction form
    658,134.60/907,760.16 = 428,268.78/x
  3. Step 3: Cross multiply
    658,134.60x = 907,760.16 × 428,268.78
  4. Step 4: Simplify right side
    658,134.60x = 388,765,336,255.81
  5. Step 5: Solve for x
    x = 388,765,336,255.81/658,134.60
  6. Step 6: Final answer
    x = 590,707.94

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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.