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Finding the Fourth Proportional to 553,619.78, 763,995.29 and 298,970.94

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Solution

The fourth proportional to 553,619.78, 763,995.29 and 298,970.94 is: 412,579.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,619.78 : 763,995.29 = 298,970.94 : x
  2. Step 2: Convert to fraction form
    553,619.78/763,995.29 = 298,970.94/x
  3. Step 3: Cross multiply
    553,619.78x = 763,995.29 × 298,970.94
  4. Step 4: Simplify right side
    553,619.78x = 228,412,388,512.02
  5. Step 5: Solve for x
    x = 228,412,388,512.02/553,619.78
  6. Step 6: Final answer
    x = 412,579.89

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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.