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Finding the Fourth Proportional to 620,173.90, 855,781.48 and 348,188.67

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Solution

The fourth proportional to 620,173.90, 855,781.48 and 348,188.67 is: 480,467.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,173.90 : 855,781.48 = 348,188.67 : x
  2. Step 2: Convert to fraction form
    620,173.90/855,781.48 = 348,188.67/x
  3. Step 3: Cross multiply
    620,173.90x = 855,781.48 × 348,188.67
  4. Step 4: Simplify right side
    620,173.90x = 297,973,412,231.46
  5. Step 5: Solve for x
    x = 297,973,412,231.46/620,173.90
  6. Step 6: Final answer
    x = 480,467.52

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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.