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Finding the Fourth Proportional to 640,719.72, 884,165.22 and 350,325.81

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Solution

The fourth proportional to 640,719.72, 884,165.22 and 350,325.81 is: 483,434.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,719.72 : 884,165.22 = 350,325.81 : x
  2. Step 2: Convert to fraction form
    640,719.72/884,165.22 = 350,325.81/x
  3. Step 3: Cross multiply
    640,719.72x = 884,165.22 × 350,325.81
  4. Step 4: Simplify right side
    640,719.72x = 309,745,896,870.33
  5. Step 5: Solve for x
    x = 309,745,896,870.33/640,719.72
  6. Step 6: Final answer
    x = 483,434.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.