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Finding the Fourth Proportional to 539,311.86, 744,295.80 and 312,942.78

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Solution

The fourth proportional to 539,311.86, 744,295.80 and 312,942.78 is: 431,887.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,311.86 : 744,295.80 = 312,942.78 : x
  2. Step 2: Convert to fraction form
    539,311.86/744,295.80 = 312,942.78/x
  3. Step 3: Cross multiply
    539,311.86x = 744,295.80 × 312,942.78
  4. Step 4: Simplify right side
    539,311.86x = 232,921,996,794.32
  5. Step 5: Solve for x
    x = 232,921,996,794.32/539,311.86
  6. Step 6: Final answer
    x = 431,887.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.