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Finding the Fourth Proportional to 625,686.35, 863,491.37 and 353,756.85

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Solution

The fourth proportional to 625,686.35, 863,491.37 and 353,756.85 is: 488,209.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,686.35 : 863,491.37 = 353,756.85 : x
  2. Step 2: Convert to fraction form
    625,686.35/863,491.37 = 353,756.85/x
  3. Step 3: Cross multiply
    625,686.35x = 863,491.37 × 353,756.85
  4. Step 4: Simplify right side
    625,686.35x = 305,465,985,284.60
  5. Step 5: Solve for x
    x = 305,465,985,284.60/625,686.35
  6. Step 6: Final answer
    x = 488,209.45

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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.