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Finding the Fourth Proportional to 438,043.20, 655,752.60 and 260,458.80

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Solution

The fourth proportional to 438,043.20, 655,752.60 and 260,458.80 is: 389,907.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,043.20 : 655,752.60 = 260,458.80 : x
  2. Step 2: Convert to fraction form
    438,043.20/655,752.60 = 260,458.80/x
  3. Step 3: Cross multiply
    438,043.20x = 655,752.60 × 260,458.80
  4. Step 4: Simplify right side
    438,043.20x = 170,796,535,292.88
  5. Step 5: Solve for x
    x = 170,796,535,292.88/438,043.20
  6. Step 6: Final answer
    x = 389,907.97

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1.5x scale

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.