Home / 840,328.80-1,259,902.72-307,780.64

Finding the Fourth Proportional to 840,328.80, 1,259,902.72 and 307,780.64

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Solution

The fourth proportional to 840,328.80, 1,259,902.72 and 307,780.64 is: 461,454.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    840,328.80 : 1,259,902.72 = 307,780.64 : x
  2. Step 2: Convert to fraction form
    840,328.80/1,259,902.72 = 307,780.64/x
  3. Step 3: Cross multiply
    840,328.80x = 1,259,902.72 × 307,780.64
  4. Step 4: Simplify right side
    840,328.80x = 387,773,665,499.34
  5. Step 5: Solve for x
    x = 387,773,665,499.34/840,328.80
  6. Step 6: Final answer
    x = 461,454.69

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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.