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Finding the Fourth Proportional to 620,488, 856,180.17 and 348,503.79

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Solution

The fourth proportional to 620,488, 856,180.17 and 348,503.79 is: 480,882.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,488 : 856,180.17 = 348,503.79 : x
  2. Step 2: Convert to fraction form
    620,488/856,180.17 = 348,503.79/x
  3. Step 3: Cross multiply
    620,488x = 856,180.17 × 348,503.79
  4. Step 4: Simplify right side
    620,488x = 298,382,034,167.84
  5. Step 5: Solve for x
    x = 298,382,034,167.84/620,488
  6. Step 6: Final answer
    x = 480,882.84

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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.