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Finding the Fourth Proportional to 455,539.20, 683,308.80 and 431,044.80

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Solution

The fourth proportional to 455,539.20, 683,308.80 and 431,044.80 is: 646,567.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,539.20 : 683,308.80 = 431,044.80 : x
  2. Step 2: Convert to fraction form
    455,539.20/683,308.80 = 431,044.80/x
  3. Step 3: Cross multiply
    455,539.20x = 683,308.80 × 431,044.80
  4. Step 4: Simplify right side
    455,539.20x = 294,536,705,034.24
  5. Step 5: Solve for x
    x = 294,536,705,034.24/455,539.20
  6. Step 6: Final answer
    x = 646,567.20

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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.