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Finding the Fourth Proportional to 315,420.23, 435,383.71 and 251,007.61

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Solution

The fourth proportional to 315,420.23, 435,383.71 and 251,007.61 is: 346,473.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,420.23 : 435,383.71 = 251,007.61 : x
  2. Step 2: Convert to fraction form
    315,420.23/435,383.71 = 251,007.61/x
  3. Step 3: Cross multiply
    315,420.23x = 435,383.71 × 251,007.61
  4. Step 4: Simplify right side
    315,420.23x = 109,284,623,580.40
  5. Step 5: Solve for x
    x = 109,284,623,580.40/315,420.23
  6. Step 6: Final answer
    x = 346,473.10

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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.