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Finding the Fourth Proportional to 539,621.20, 809,658.60 and 290,011.60

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Solution

The fourth proportional to 539,621.20, 809,658.60 and 290,011.60 is: 435,139.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,621.20 : 809,658.60 = 290,011.60 : x
  2. Step 2: Convert to fraction form
    539,621.20/809,658.60 = 290,011.60/x
  3. Step 3: Cross multiply
    539,621.20x = 809,658.60 × 290,011.60
  4. Step 4: Simplify right side
    539,621.20x = 234,810,386,039.76
  5. Step 5: Solve for x
    x = 234,810,386,039.76/539,621.20
  6. Step 6: Final answer
    x = 435,139.29

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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.