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Finding the Fourth Proportional to 236,710.20, 355,065.30 and 210,905.40

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Solution

The fourth proportional to 236,710.20, 355,065.30 and 210,905.40 is: 316,358.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    236,710.20 : 355,065.30 = 210,905.40 : x
  2. Step 2: Convert to fraction form
    236,710.20/355,065.30 = 210,905.40/x
  3. Step 3: Cross multiply
    236,710.20x = 355,065.30 × 210,905.40
  4. Step 4: Simplify right side
    236,710.20x = 74,885,189,122.62
  5. Step 5: Solve for x
    x = 74,885,189,122.62/236,710.20
  6. Step 6: Final answer
    x = 316,358.10

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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.