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Finding the Fourth Proportional to 719,714.88, 992,213.28 and 515,931.84

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Solution

The fourth proportional to 719,714.88, 992,213.28 and 515,931.84 is: 711,273.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,714.88 : 992,213.28 = 515,931.84 : x
  2. Step 2: Convert to fraction form
    719,714.88/992,213.28 = 515,931.84/x
  3. Step 3: Cross multiply
    719,714.88x = 992,213.28 × 515,931.84
  4. Step 4: Simplify right side
    719,714.88x = 511,914,423,222.84
  5. Step 5: Solve for x
    x = 511,914,423,222.84/719,714.88
  6. Step 6: Final answer
    x = 711,273.92

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Double scale
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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.