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Finding the Fourth Proportional to 539,673.80, 809,510.70 and 382,080.20

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Solution

The fourth proportional to 539,673.80, 809,510.70 and 382,080.20 is: 573,120.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,673.80 : 809,510.70 = 382,080.20 : x
  2. Step 2: Convert to fraction form
    539,673.80/809,510.70 = 382,080.20/x
  3. Step 3: Cross multiply
    539,673.80x = 809,510.70 × 382,080.20
  4. Step 4: Simplify right side
    539,673.80x = 309,298,010,158.14
  5. Step 5: Solve for x
    x = 309,298,010,158.14/539,673.80
  6. Step 6: Final answer
    x = 573,120.30

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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.