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Finding the Fourth Proportional to 315,898.03, 435,924.23 and 172,658.18

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Solution

The fourth proportional to 315,898.03, 435,924.23 and 172,658.18 is: 238,260.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,898.03 : 435,924.23 = 172,658.18 : x
  2. Step 2: Convert to fraction form
    315,898.03/435,924.23 = 172,658.18/x
  3. Step 3: Cross multiply
    315,898.03x = 435,924.23 × 172,658.18
  4. Step 4: Simplify right side
    315,898.03x = 75,265,885,367.42
  5. Step 5: Solve for x
    x = 75,265,885,367.42/315,898.03
  6. Step 6: Final answer
    x = 238,260.07

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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.