Home / 675,136.80-1,011,344.40-421,639.20

Finding the Fourth Proportional to 675,136.80, 1,011,344.40 and 421,639.20

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Solution

The fourth proportional to 675,136.80, 1,011,344.40 and 421,639.20 is: 631,608.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    675,136.80 : 1,011,344.40 = 421,639.20 : x
  2. Step 2: Convert to fraction form
    675,136.80/1,011,344.40 = 421,639.20/x
  3. Step 3: Cross multiply
    675,136.80x = 1,011,344.40 × 421,639.20
  4. Step 4: Simplify right side
    675,136.80x = 426,422,443,740.48
  5. Step 5: Solve for x
    x = 426,422,443,740.48/675,136.80
  6. Step 6: Final answer
    x = 631,608.95

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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.