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Finding the Fourth Proportional to 620,288,789.76, 855,998,707.72 and 338,031,308.12

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Solution

The fourth proportional to 620,288,789.76, 855,998,707.72 and 338,031,308.12 is: 466,483,302.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,288,789.76 : 855,998,707.72 = 338,031,308.12 : x
  2. Step 2: Convert to fraction form
    620,288,789.76/855,998,707.72 = 338,031,308.12/x
  3. Step 3: Cross multiply
    620,288,789.76x = 855,998,707.72 × 338,031,308.12
  4. Step 4: Simplify right side
    620,288,789.76x = 289,354,362,919,621,184
  5. Step 5: Solve for x
    x = 289,354,362,919,621,184/620,288,789.76
  6. Step 6: Final answer
    x = 466,483,302.13

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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.