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Finding the Fourth Proportional to 422,641,205.40, 633,961,808.10 and 291,127,272.60

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Solution

The fourth proportional to 422,641,205.40, 633,961,808.10 and 291,127,272.60 is: 436,690,908.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,641,205.40 : 633,961,808.10 = 291,127,272.60 : x
  2. Step 2: Convert to fraction form
    422,641,205.40/633,961,808.10 = 291,127,272.60/x
  3. Step 3: Cross multiply
    422,641,205.40x = 633,961,808.10 × 291,127,272.60
  4. Step 4: Simplify right side
    422,641,205.40x = 184,563,572,124,717,600
  5. Step 5: Solve for x
    x = 184,563,572,124,717,600/422,641,205.40
  6. Step 6: Final answer
    x = 436,690,908.90

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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.