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Finding the Fourth Proportional to 553,615.55, 763,989.51 and 298,966.75

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Solution

The fourth proportional to 553,615.55, 763,989.51 and 298,966.75 is: 412,574.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,615.55 : 763,989.51 = 298,966.75 : x
  2. Step 2: Convert to fraction form
    553,615.55/763,989.51 = 298,966.75/x
  3. Step 3: Cross multiply
    553,615.55x = 763,989.51 × 298,966.75
  4. Step 4: Simplify right side
    553,615.55x = 228,407,460,838.79
  5. Step 5: Solve for x
    x = 228,407,460,838.79/553,615.55
  6. Step 6: Final answer
    x = 412,574.14

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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.