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Finding the Fourth Proportional to 1,862,893.80, 2,794,996.80 and 915,631.20

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Solution

The fourth proportional to 1,862,893.80, 2,794,996.80 and 915,631.20 is: 1,373,769.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,862,893.80 : 2,794,996.80 = 915,631.20 : x
  2. Step 2: Convert to fraction form
    1,862,893.80/2,794,996.80 = 915,631.20/x
  3. Step 3: Cross multiply
    1,862,893.80x = 2,794,996.80 × 915,631.20
  4. Step 4: Simplify right side
    1,862,893.80x = 2,559,186,273,980.16
  5. Step 5: Solve for x
    x = 2,559,186,273,980.16/1,862,893.80
  6. Step 6: Final answer
    x = 1,373,769.28

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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.