Home / 675,138.30-1,011,346.65-421,640.70

Finding the Fourth Proportional to 675,138.30, 1,011,346.65 and 421,640.70

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Solution

The fourth proportional to 675,138.30, 1,011,346.65 and 421,640.70 is: 631,611.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    675,138.30 : 1,011,346.65 = 421,640.70 : x
  2. Step 2: Convert to fraction form
    675,138.30/1,011,346.65 = 421,640.70/x
  3. Step 3: Cross multiply
    675,138.30x = 1,011,346.65 × 421,640.70
  4. Step 4: Simplify right side
    675,138.30x = 426,424,909,448.66
  5. Step 5: Solve for x
    x = 426,424,909,448.66/675,138.30
  6. Step 6: Final answer
    x = 631,611.20

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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.