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Finding the Fourth Proportional to 919,160, 1,268,440.80 and 516,754.88

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Solution

The fourth proportional to 919,160, 1,268,440.80 and 516,754.88 is: 713,121.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,160 : 1,268,440.80 = 516,754.88 : x
  2. Step 2: Convert to fraction form
    919,160/1,268,440.80 = 516,754.88/x
  3. Step 3: Cross multiply
    919,160x = 1,268,440.80 × 516,754.88
  4. Step 4: Simplify right side
    919,160x = 655,472,973,391.10
  5. Step 5: Solve for x
    x = 655,472,973,391.10/919,160
  6. Step 6: Final answer
    x = 713,121.73

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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.