Home / 672,972.49-1,009,455.49-639,334.81

Finding the Fourth Proportional to 672,972.49, 1,009,455.49 and 639,334.81

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Solution

The fourth proportional to 672,972.49, 1,009,455.49 and 639,334.81 is: 958,999.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    672,972.49 : 1,009,455.49 = 639,334.81 : x
  2. Step 2: Convert to fraction form
    672,972.49/1,009,455.49 = 639,334.81/x
  3. Step 3: Cross multiply
    672,972.49x = 1,009,455.49 × 639,334.81
  4. Step 4: Simplify right side
    672,972.49x = 645,380,033,902.61
  5. Step 5: Solve for x
    x = 645,380,033,902.61/672,972.49
  6. Step 6: Final answer
    x = 958,999.13

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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.