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Finding the Fourth Proportional to 537,939.40, 807,686.70 and 405,747.40

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Solution

The fourth proportional to 537,939.40, 807,686.70 and 405,747.40 is: 609,207.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    537,939.40 : 807,686.70 = 405,747.40 : x
  2. Step 2: Convert to fraction form
    537,939.40/807,686.70 = 405,747.40/x
  3. Step 3: Cross multiply
    537,939.40x = 807,686.70 × 405,747.40
  4. Step 4: Simplify right side
    537,939.40x = 327,716,778,539.58
  5. Step 5: Solve for x
    x = 327,716,778,539.58/537,939.40
  6. Step 6: Final answer
    x = 609,207.61

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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.