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Finding the Fourth Proportional to 876,823.20, 1,312,610.40 and 824,918.40

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Solution

The fourth proportional to 876,823.20, 1,312,610.40 and 824,918.40 is: 1,234,908.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    876,823.20 : 1,312,610.40 = 824,918.40 : x
  2. Step 2: Convert to fraction form
    876,823.20/1,312,610.40 = 824,918.40/x
  3. Step 3: Cross multiply
    876,823.20x = 1,312,610.40 × 824,918.40
  4. Step 4: Simplify right side
    876,823.20x = 1,082,796,470,991.36
  5. Step 5: Solve for x
    x = 1,082,796,470,991.36/876,823.20
  6. Step 6: Final answer
    x = 1,234,908.56

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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.