Home / 817,913.37-1,227,120.45-418,836.70

Finding the Fourth Proportional to 817,913.37, 1,227,120.45 and 418,836.70

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Solution

The fourth proportional to 817,913.37, 1,227,120.45 and 418,836.70 is: 628,383.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    817,913.37 : 1,227,120.45 = 418,836.70 : x
  2. Step 2: Convert to fraction form
    817,913.37/1,227,120.45 = 418,836.70/x
  3. Step 3: Cross multiply
    817,913.37x = 1,227,120.45 × 418,836.70
  4. Step 4: Simplify right side
    817,913.37x = 513,963,076,712.71
  5. Step 5: Solve for x
    x = 513,963,076,712.71/817,913.37
  6. Step 6: Final answer
    x = 628,383.27

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.