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Finding the Fourth Proportional to 618,638.72, 853,681.02 and 363,940.72

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Solution

The fourth proportional to 618,638.72, 853,681.02 and 363,940.72 is: 502,214.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,638.72 : 853,681.02 = 363,940.72 : x
  2. Step 2: Convert to fraction form
    618,638.72/853,681.02 = 363,940.72/x
  3. Step 3: Cross multiply
    618,638.72x = 853,681.02 × 363,940.72
  4. Step 4: Simplify right side
    618,638.72x = 310,689,285,069.13
  5. Step 5: Solve for x
    x = 310,689,285,069.13/618,638.72
  6. Step 6: Final answer
    x = 502,214.42

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1.5x scale

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.