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Finding the Fourth Proportional to 306,442,672.80, 459,664,009.20 and 191,780,887.20

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Solution

The fourth proportional to 306,442,672.80, 459,664,009.20 and 191,780,887.20 is: 287,671,330.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,442,672.80 : 459,664,009.20 = 191,780,887.20 : x
  2. Step 2: Convert to fraction form
    306,442,672.80/459,664,009.20 = 191,780,887.20/x
  3. Step 3: Cross multiply
    306,442,672.80x = 459,664,009.20 × 191,780,887.20
  4. Step 4: Simplify right side
    306,442,672.80x = 88,154,771,498,284,960
  5. Step 5: Solve for x
    x = 88,154,771,498,284,960/306,442,672.80
  6. Step 6: Final answer
    x = 287,671,330.80

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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.