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Finding the Fourth Proportional to 308,998.20, 463,497.30 and 121,985.40

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Solution

The fourth proportional to 308,998.20, 463,497.30 and 121,985.40 is: 182,978.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,998.20 : 463,497.30 = 121,985.40 : x
  2. Step 2: Convert to fraction form
    308,998.20/463,497.30 = 121,985.40/x
  3. Step 3: Cross multiply
    308,998.20x = 463,497.30 × 121,985.40
  4. Step 4: Simplify right side
    308,998.20x = 56,539,903,539.42
  5. Step 5: Solve for x
    x = 56,539,903,539.42/308,998.20
  6. Step 6: Final answer
    x = 182,978.10

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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.