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Finding the Fourth Proportional to 488,136.80, 732,205.20 and 311,427.20

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Solution

The fourth proportional to 488,136.80, 732,205.20 and 311,427.20 is: 467,140.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    488,136.80 : 732,205.20 = 311,427.20 : x
  2. Step 2: Convert to fraction form
    488,136.80/732,205.20 = 311,427.20/x
  3. Step 3: Cross multiply
    488,136.80x = 732,205.20 × 311,427.20
  4. Step 4: Simplify right side
    488,136.80x = 228,028,615,261.44
  5. Step 5: Solve for x
    x = 228,028,615,261.44/488,136.80
  6. Step 6: Final answer
    x = 467,140.80

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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.