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Finding the Fourth Proportional to 404,330.60, 606,495.90 and 278,359.40

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Solution

The fourth proportional to 404,330.60, 606,495.90 and 278,359.40 is: 417,539.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,330.60 : 606,495.90 = 278,359.40 : x
  2. Step 2: Convert to fraction form
    404,330.60/606,495.90 = 278,359.40/x
  3. Step 3: Cross multiply
    404,330.60x = 606,495.90 × 278,359.40
  4. Step 4: Simplify right side
    404,330.60x = 168,823,834,826.46
  5. Step 5: Solve for x
    x = 168,823,834,826.46/404,330.60
  6. Step 6: Final answer
    x = 417,539.10

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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.