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Finding the Fourth Proportional to 608,834.16, 840,023.60 and 379,428.66

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Solution

The fourth proportional to 608,834.16, 840,023.60 and 379,428.66 is: 523,507.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    608,834.16 : 840,023.60 = 379,428.66 : x
  2. Step 2: Convert to fraction form
    608,834.16/840,023.60 = 379,428.66/x
  3. Step 3: Cross multiply
    608,834.16x = 840,023.60 × 379,428.66
  4. Step 4: Simplify right side
    608,834.16x = 318,729,027,019.23
  5. Step 5: Solve for x
    x = 318,729,027,019.23/608,834.16
  6. Step 6: Final answer
    x = 523,507.14

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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.