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Finding the Fourth Proportional to 640,006.40, 958,166.40 and 621,574.40

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Solution

The fourth proportional to 640,006.40, 958,166.40 and 621,574.40 is: 930,571.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,006.40 : 958,166.40 = 621,574.40 : x
  2. Step 2: Convert to fraction form
    640,006.40/958,166.40 = 621,574.40/x
  3. Step 3: Cross multiply
    640,006.40x = 958,166.40 × 621,574.40
  4. Step 4: Simplify right side
    640,006.40x = 595,571,705,180.16
  5. Step 5: Solve for x
    x = 595,571,705,180.16/640,006.40
  6. Step 6: Final answer
    x = 930,571.48

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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.