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Finding the Fourth Proportional to 539,477.40, 809,216.10 and 258,850.20

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Solution

The fourth proportional to 539,477.40, 809,216.10 and 258,850.20 is: 388,275.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,477.40 : 809,216.10 = 258,850.20 : x
  2. Step 2: Convert to fraction form
    539,477.40/809,216.10 = 258,850.20/x
  3. Step 3: Cross multiply
    539,477.40x = 809,216.10 × 258,850.20
  4. Step 4: Simplify right side
    539,477.40x = 209,465,749,328.22
  5. Step 5: Solve for x
    x = 209,465,749,328.22/539,477.40
  6. Step 6: Final answer
    x = 388,275.30

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Double scale
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Similar ratio
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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.