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Finding the Fourth Proportional to 808,909.20, 1,213,801.20 and 335,642.40

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Solution

The fourth proportional to 808,909.20, 1,213,801.20 and 335,642.40 is: 503,645.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    808,909.20 : 1,213,801.20 = 335,642.40 : x
  2. Step 2: Convert to fraction form
    808,909.20/1,213,801.20 = 335,642.40/x
  3. Step 3: Cross multiply
    808,909.20x = 1,213,801.20 × 335,642.40
  4. Step 4: Simplify right side
    808,909.20x = 407,403,147,890.88
  5. Step 5: Solve for x
    x = 407,403,147,890.88/808,909.20
  6. Step 6: Final answer
    x = 503,645.09

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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.