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Finding the Fourth Proportional to 717,362.28, 989,953.38 and 395,065.46

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Solution

The fourth proportional to 717,362.28, 989,953.38 and 395,065.46 is: 545,186.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,362.28 : 989,953.38 = 395,065.46 : x
  2. Step 2: Convert to fraction form
    717,362.28/989,953.38 = 395,065.46/x
  3. Step 3: Cross multiply
    717,362.28x = 989,953.38 × 395,065.46
  4. Step 4: Simplify right side
    717,362.28x = 391,096,382,498.49
  5. Step 5: Solve for x
    x = 391,096,382,498.49/717,362.28
  6. Step 6: Final answer
    x = 545,186.71

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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.