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Finding the Fourth Proportional to 404,290.40, 606,435.60 and 278,319.20

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Solution

The fourth proportional to 404,290.40, 606,435.60 and 278,319.20 is: 417,478.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,290.40 : 606,435.60 = 278,319.20 : x
  2. Step 2: Convert to fraction form
    404,290.40/606,435.60 = 278,319.20/x
  3. Step 3: Cross multiply
    404,290.40x = 606,435.60 × 278,319.20
  4. Step 4: Simplify right side
    404,290.40x = 168,782,671,043.52
  5. Step 5: Solve for x
    x = 168,782,671,043.52/404,290.40
  6. Step 6: Final answer
    x = 417,478.80

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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.