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Finding the Fourth Proportional to 620,900.89, 856,850.95 and 375,882.40

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Solution

The fourth proportional to 620,900.89, 856,850.95 and 375,882.40 is: 518,722.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,900.89 : 856,850.95 = 375,882.40 : x
  2. Step 2: Convert to fraction form
    620,900.89/856,850.95 = 375,882.40/x
  3. Step 3: Cross multiply
    620,900.89x = 856,850.95 × 375,882.40
  4. Step 4: Simplify right side
    620,900.89x = 322,075,191,528.28
  5. Step 5: Solve for x
    x = 322,075,191,528.28/620,900.89
  6. Step 6: Final answer
    x = 518,722.39

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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.