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Finding the Fourth Proportional to 922,172.80, 1,383,259.20 and 257,324.80

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Solution

The fourth proportional to 922,172.80, 1,383,259.20 and 257,324.80 is: 385,987.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    922,172.80 : 1,383,259.20 = 257,324.80 : x
  2. Step 2: Convert to fraction form
    922,172.80/1,383,259.20 = 257,324.80/x
  3. Step 3: Cross multiply
    922,172.80x = 1,383,259.20 × 257,324.80
  4. Step 4: Simplify right side
    922,172.80x = 355,946,896,988.16
  5. Step 5: Solve for x
    x = 355,946,896,988.16/922,172.80
  6. Step 6: Final answer
    x = 385,987.20

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1.5x scale

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.