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Finding the Fourth Proportional to 611,091.50, 916,662.09 and 291,078.86

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Solution

The fourth proportional to 611,091.50, 916,662.09 and 291,078.86 is: 436,630.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,091.50 : 916,662.09 = 291,078.86 : x
  2. Step 2: Convert to fraction form
    611,091.50/916,662.09 = 291,078.86/x
  3. Step 3: Cross multiply
    611,091.50x = 916,662.09 × 291,078.86
  4. Step 4: Simplify right side
    611,091.50x = 266,820,956,162.42
  5. Step 5: Solve for x
    x = 266,820,956,162.42/611,091.50
  6. Step 6: Final answer
    x = 436,630.12

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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.