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Finding the Fourth Proportional to 368,613.84, 553,053.78 and 128,763.12

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Solution

The fourth proportional to 368,613.84, 553,053.78 and 128,763.12 is: 193,191.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,613.84 : 553,053.78 = 128,763.12 : x
  2. Step 2: Convert to fraction form
    368,613.84/553,053.78 = 128,763.12/x
  3. Step 3: Cross multiply
    368,613.84x = 553,053.78 × 128,763.12
  4. Step 4: Simplify right side
    368,613.84x = 71,212,930,240.59
  5. Step 5: Solve for x
    x = 71,212,930,240.59/368,613.84
  6. Step 6: Final answer
    x = 193,191.15

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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.