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Finding the Fourth Proportional to 618,655.13, 853,701.77 and 346,676.57

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Solution

The fourth proportional to 618,655.13, 853,701.77 and 346,676.57 is: 478,389.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,655.13 : 853,701.77 = 346,676.57 : x
  2. Step 2: Convert to fraction form
    618,655.13/853,701.77 = 346,676.57/x
  3. Step 3: Cross multiply
    618,655.13x = 853,701.77 × 346,676.57
  4. Step 4: Simplify right side
    618,655.13x = 295,958,399,693.15
  5. Step 5: Solve for x
    x = 295,958,399,693.15/618,655.13
  6. Step 6: Final answer
    x = 478,389.95

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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.