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Finding the Fourth Proportional to 210,829.40, 316,416.90 and 203,917.40

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Solution

The fourth proportional to 210,829.40, 316,416.90 and 203,917.40 is: 306,043.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,829.40 : 316,416.90 = 203,917.40 : x
  2. Step 2: Convert to fraction form
    210,829.40/316,416.90 = 203,917.40/x
  3. Step 3: Cross multiply
    210,829.40x = 316,416.90 × 203,917.40
  4. Step 4: Simplify right side
    210,829.40x = 64,522,911,564.06
  5. Step 5: Solve for x
    x = 64,522,911,564.06/210,829.40
  6. Step 6: Final answer
    x = 306,043.23

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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.