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Finding the Fourth Proportional to 640,379.87, 883,742.55 and 350,007.63

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Solution

The fourth proportional to 640,379.87, 883,742.55 and 350,007.63 is: 483,020.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,379.87 : 883,742.55 = 350,007.63 : x
  2. Step 2: Convert to fraction form
    640,379.87/883,742.55 = 350,007.63/x
  3. Step 3: Cross multiply
    640,379.87x = 883,742.55 × 350,007.63
  4. Step 4: Simplify right side
    640,379.87x = 309,316,637,768.94
  5. Step 5: Solve for x
    x = 309,316,637,768.94/640,379.87
  6. Step 6: Final answer
    x = 483,020.55

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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.