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Finding the Fourth Proportional to 669,448.79, 1,004,343.09 and 309,879

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Solution

The fourth proportional to 669,448.79, 1,004,343.09 and 309,879 is: 464,897.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    669,448.79 : 1,004,343.09 = 309,879 : x
  2. Step 2: Convert to fraction form
    669,448.79/1,004,343.09 = 309,879/x
  3. Step 3: Cross multiply
    669,448.79x = 1,004,343.09 × 309,879
  4. Step 4: Simplify right side
    669,448.79x = 311,224,832,386.11
  5. Step 5: Solve for x
    x = 311,224,832,386.11/669,448.79
  6. Step 6: Final answer
    x = 464,897.15

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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.