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Finding the Fourth Proportional to 426,195.60, 638,515.80 and 346,880.40

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Solution

The fourth proportional to 426,195.60, 638,515.80 and 346,880.40 is: 519,687.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,195.60 : 638,515.80 = 346,880.40 : x
  2. Step 2: Convert to fraction form
    426,195.60/638,515.80 = 346,880.40/x
  3. Step 3: Cross multiply
    426,195.60x = 638,515.80 × 346,880.40
  4. Step 4: Simplify right side
    426,195.60x = 221,488,616,110.32
  5. Step 5: Solve for x
    x = 221,488,616,110.32/426,195.60
  6. Step 6: Final answer
    x = 519,687.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.