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Finding the Fourth Proportional to 618,779.70, 853,955.45 and 346,847.66

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Solution

The fourth proportional to 618,779.70, 853,955.45 and 346,847.66 is: 478,671.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,779.70 : 853,955.45 = 346,847.66 : x
  2. Step 2: Convert to fraction form
    618,779.70/853,955.45 = 346,847.66/x
  3. Step 3: Cross multiply
    618,779.70x = 853,955.45 × 346,847.66
  4. Step 4: Simplify right side
    618,779.70x = 296,192,443,572.73
  5. Step 5: Solve for x
    x = 296,192,443,572.73/618,779.70
  6. Step 6: Final answer
    x = 478,671.88

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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.