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Finding the Fourth Proportional to 618,543.77, 853,589.81 and 346,613.81

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Solution

The fourth proportional to 618,543.77, 853,589.81 and 346,613.81 is: 478,326.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,543.77 : 853,589.81 = 346,613.81 : x
  2. Step 2: Convert to fraction form
    618,543.77/853,589.81 = 346,613.81/x
  3. Step 3: Cross multiply
    618,543.77x = 853,589.81 × 346,613.81
  4. Step 4: Simplify right side
    618,543.77x = 295,866,012,819.86
  5. Step 5: Solve for x
    x = 295,866,012,819.86/618,543.77
  6. Step 6: Final answer
    x = 478,326.72

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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.