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Finding the Fourth Proportional to 388,502.90, 536,158.70 and 235,555.74

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Solution

The fourth proportional to 388,502.90, 536,158.70 and 235,555.74 is: 325,081.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,502.90 : 536,158.70 = 235,555.74 : x
  2. Step 2: Convert to fraction form
    388,502.90/536,158.70 = 235,555.74/x
  3. Step 3: Cross multiply
    388,502.90x = 536,158.70 × 235,555.74
  4. Step 4: Simplify right side
    388,502.90x = 126,295,259,335.94
  5. Step 5: Solve for x
    x = 126,295,259,335.94/388,502.90
  6. Step 6: Final answer
    x = 325,081.90

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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.