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Finding the Fourth Proportional to 313,638.36, 432,789.72 and 177,645.24

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Solution

The fourth proportional to 313,638.36, 432,789.72 and 177,645.24 is: 245,132.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,638.36 : 432,789.72 = 177,645.24 : x
  2. Step 2: Convert to fraction form
    313,638.36/432,789.72 = 177,645.24/x
  3. Step 3: Cross multiply
    313,638.36x = 432,789.72 × 177,645.24
  4. Step 4: Simplify right side
    313,638.36x = 76,883,033,678.93
  5. Step 5: Solve for x
    x = 76,883,033,678.93/313,638.36
  6. Step 6: Final answer
    x = 245,132.75

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1.5x scale

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.