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Finding the Fourth Proportional to 539,741.80, 809,612.70 and 340,287.40

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Solution

The fourth proportional to 539,741.80, 809,612.70 and 340,287.40 is: 510,431.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,741.80 : 809,612.70 = 340,287.40 : x
  2. Step 2: Convert to fraction form
    539,741.80/809,612.70 = 340,287.40/x
  3. Step 3: Cross multiply
    539,741.80x = 809,612.70 × 340,287.40
  4. Step 4: Simplify right side
    539,741.80x = 275,501,000,689.98
  5. Step 5: Solve for x
    x = 275,501,000,689.98/539,741.80
  6. Step 6: Final answer
    x = 510,431.10

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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.