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Finding the Fourth Proportional to 618,789.60, 853,990.16 and 346,858.02

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Solution

The fourth proportional to 618,789.60, 853,990.16 and 346,858.02 is: 478,697.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,789.60 : 853,990.16 = 346,858.02 : x
  2. Step 2: Convert to fraction form
    618,789.60/853,990.16 = 346,858.02/x
  3. Step 3: Cross multiply
    618,789.60x = 853,990.16 × 346,858.02
  4. Step 4: Simplify right side
    618,789.60x = 296,213,334,262.79
  5. Step 5: Solve for x
    x = 296,213,334,262.79/618,789.60
  6. Step 6: Final answer
    x = 478,697.98

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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.