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Finding the Fourth Proportional to 874,131.40, 1,310,937.90 and 341,345.80

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Solution

The fourth proportional to 874,131.40, 1,310,937.90 and 341,345.80 is: 511,917.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    874,131.40 : 1,310,937.90 = 341,345.80 : x
  2. Step 2: Convert to fraction form
    874,131.40/1,310,937.90 = 341,345.80/x
  3. Step 3: Cross multiply
    874,131.40x = 1,310,937.90 × 341,345.80
  4. Step 4: Simplify right side
    874,131.40x = 447,483,146,225.82
  5. Step 5: Solve for x
    x = 447,483,146,225.82/874,131.40
  6. Step 6: Final answer
    x = 511,917.48

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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.