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Finding the Fourth Proportional to 640,744.56, 884,216.52 and 457,320.87

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Solution

The fourth proportional to 640,744.56, 884,216.52 and 457,320.87 is: 631,094.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,744.56 : 884,216.52 = 457,320.87 : x
  2. Step 2: Convert to fraction form
    640,744.56/884,216.52 = 457,320.87/x
  3. Step 3: Cross multiply
    640,744.56x = 884,216.52 × 457,320.87
  4. Step 4: Simplify right side
    640,744.56x = 404,370,668,194.77
  5. Step 5: Solve for x
    x = 404,370,668,194.77/640,744.56
  6. Step 6: Final answer
    x = 631,094.97

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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.