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Finding the Fourth Proportional to 553,615.76, 763,989.75 and 298,966.94

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Solution

The fourth proportional to 553,615.76, 763,989.75 and 298,966.94 is: 412,574.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,615.76 : 763,989.75 = 298,966.94 : x
  2. Step 2: Convert to fraction form
    553,615.76/763,989.75 = 298,966.94/x
  3. Step 3: Cross multiply
    553,615.76x = 763,989.75 × 298,966.94
  4. Step 4: Simplify right side
    553,615.76x = 228,407,677,748.87
  5. Step 5: Solve for x
    x = 228,407,677,748.87/553,615.76
  6. Step 6: Final answer
    x = 412,574.38

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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.