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Finding the Fourth Proportional to 549,338.20, 824,007.30 and 389,905.90

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Solution

The fourth proportional to 549,338.20, 824,007.30 and 389,905.90 is: 584,858.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    549,338.20 : 824,007.30 = 389,905.90 : x
  2. Step 2: Convert to fraction form
    549,338.20/824,007.30 = 389,905.90/x
  3. Step 3: Cross multiply
    549,338.20x = 824,007.30 × 389,905.90
  4. Step 4: Simplify right side
    549,338.20x = 321,285,307,913.07
  5. Step 5: Solve for x
    x = 321,285,307,913.07/549,338.20
  6. Step 6: Final answer
    x = 584,858.85

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Similar ratio
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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.