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Finding the Fourth Proportional to 486,463.40, 728,139.90 and 346,495.40

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Solution

The fourth proportional to 486,463.40, 728,139.90 and 346,495.40 is: 518,635.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,463.40 : 728,139.90 = 346,495.40 : x
  2. Step 2: Convert to fraction form
    486,463.40/728,139.90 = 346,495.40/x
  3. Step 3: Cross multiply
    486,463.40x = 728,139.90 × 346,495.40
  4. Step 4: Simplify right side
    486,463.40x = 252,297,125,906.46
  5. Step 5: Solve for x
    x = 252,297,125,906.46/486,463.40
  6. Step 6: Final answer
    x = 518,635.37

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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.