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Finding the Fourth Proportional to 996,921.80, 1,495,382.70 and 919,939.40

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Solution

The fourth proportional to 996,921.80, 1,495,382.70 and 919,939.40 is: 1,379,909.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    996,921.80 : 1,495,382.70 = 919,939.40 : x
  2. Step 2: Convert to fraction form
    996,921.80/1,495,382.70 = 919,939.40/x
  3. Step 3: Cross multiply
    996,921.80x = 1,495,382.70 × 919,939.40
  4. Step 4: Simplify right side
    996,921.80x = 1,375,661,463,808.38
  5. Step 5: Solve for x
    x = 1,375,661,463,808.38/996,921.80
  6. Step 6: Final answer
    x = 1,379,909.10

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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.