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Finding the Fourth Proportional to 618,718.42, 853,817.19 and 360,578.90

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Solution

The fourth proportional to 618,718.42, 853,817.19 and 360,578.90 is: 497,590.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,718.42 : 853,817.19 = 360,578.90 : x
  2. Step 2: Convert to fraction form
    618,718.42/853,817.19 = 360,578.90/x
  3. Step 3: Cross multiply
    618,718.42x = 853,817.19 × 360,578.90
  4. Step 4: Simplify right side
    618,718.42x = 307,868,463,171.29
  5. Step 5: Solve for x
    x = 307,868,463,171.29/618,718.42
  6. Step 6: Final answer
    x = 497,590.59

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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.