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Finding the Fourth Proportional to 315,818.72, 435,811.47 and 172,579.94

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Solution

The fourth proportional to 315,818.72, 435,811.47 and 172,579.94 is: 238,150.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,818.72 : 435,811.47 = 172,579.94 : x
  2. Step 2: Convert to fraction form
    315,818.72/435,811.47 = 172,579.94/x
  3. Step 3: Cross multiply
    315,818.72x = 435,811.47 × 172,579.94
  4. Step 4: Simplify right side
    315,818.72x = 75,212,317,343.91
  5. Step 5: Solve for x
    x = 75,212,317,343.91/315,818.72
  6. Step 6: Final answer
    x = 238,150.28

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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.