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Finding the Fourth Proportional to 315,814.60, 435,825.24 and 172,574.64

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Solution

The fourth proportional to 315,814.60, 435,825.24 and 172,574.64 is: 238,153.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,814.60 : 435,825.24 = 172,574.64 : x
  2. Step 2: Convert to fraction form
    315,814.60/435,825.24 = 172,574.64/x
  3. Step 3: Cross multiply
    315,814.60x = 435,825.24 × 172,574.64
  4. Step 4: Simplify right side
    315,814.60x = 75,212,383,895.91
  5. Step 5: Solve for x
    x = 75,212,383,895.91/315,814.60
  6. Step 6: Final answer
    x = 238,153.60

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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.