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Finding the Fourth Proportional to 288,128.80, 432,193.20 and 253,136.80

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Solution

The fourth proportional to 288,128.80, 432,193.20 and 253,136.80 is: 379,705.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,128.80 : 432,193.20 = 253,136.80 : x
  2. Step 2: Convert to fraction form
    288,128.80/432,193.20 = 253,136.80/x
  3. Step 3: Cross multiply
    288,128.80x = 432,193.20 × 253,136.80
  4. Step 4: Simplify right side
    288,128.80x = 109,404,003,629.76
  5. Step 5: Solve for x
    x = 109,404,003,629.76/288,128.80
  6. Step 6: Final answer
    x = 379,705.20

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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.