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Finding the Fourth Proportional to 450,046.90, 620,772.09 and 288,646.30

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Solution

The fourth proportional to 450,046.90, 620,772.09 and 288,646.30 is: 398,144.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    450,046.90 : 620,772.09 = 288,646.30 : x
  2. Step 2: Convert to fraction form
    450,046.90/620,772.09 = 288,646.30/x
  3. Step 3: Cross multiply
    450,046.90x = 620,772.09 × 288,646.30
  4. Step 4: Simplify right side
    450,046.90x = 179,183,566,615.31
  5. Step 5: Solve for x
    x = 179,183,566,615.31/450,046.90
  6. Step 6: Final answer
    x = 398,144.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.