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Finding the Fourth Proportional to 368,636.57, 553,088.00 and 128,785.88

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Solution

The fourth proportional to 368,636.57, 553,088.00 and 128,785.88 is: 193,225.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,636.57 : 553,088.00 = 128,785.88 : x
  2. Step 2: Convert to fraction form
    368,636.57/553,088.00 = 128,785.88/x
  3. Step 3: Cross multiply
    368,636.57x = 553,088.00 × 128,785.88
  4. Step 4: Simplify right side
    368,636.57x = 71,229,926,502.12
  5. Step 5: Solve for x
    x = 71,229,926,502.12/368,636.57
  6. Step 6: Final answer
    x = 193,225.34

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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.