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Finding the Fourth Proportional to 618,798.64, 853,995.49 and 346,919

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Solution

The fourth proportional to 618,798.64, 853,995.49 and 346,919 is: 478,778.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,798.64 : 853,995.49 = 346,919 : x
  2. Step 2: Convert to fraction form
    618,798.64/853,995.49 = 346,919/x
  3. Step 3: Cross multiply
    618,798.64x = 853,995.49 × 346,919
  4. Step 4: Simplify right side
    618,798.64x = 296,267,261,395.31
  5. Step 5: Solve for x
    x = 296,267,261,395.31/618,798.64
  6. Step 6: Final answer
    x = 478,778.14

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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.