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Finding the Fourth Proportional to 621,637.58, 857,858.59 and 349,705.67

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Solution

The fourth proportional to 621,637.58, 857,858.59 and 349,705.67 is: 482,593.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,637.58 : 857,858.59 = 349,705.67 : x
  2. Step 2: Convert to fraction form
    621,637.58/857,858.59 = 349,705.67/x
  3. Step 3: Cross multiply
    621,637.58x = 857,858.59 × 349,705.67
  4. Step 4: Simplify right side
    621,637.58x = 299,998,012,981.21
  5. Step 5: Solve for x
    x = 299,998,012,981.21/621,637.58
  6. Step 6: Final answer
    x = 482,593.11

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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.