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Finding the Fourth Proportional to 211,001.28, 316,631.04 and 191,314.56

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Solution

The fourth proportional to 211,001.28, 316,631.04 and 191,314.56 is: 287,088.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,001.28 : 316,631.04 = 191,314.56 : x
  2. Step 2: Convert to fraction form
    211,001.28/316,631.04 = 191,314.56/x
  3. Step 3: Cross multiply
    211,001.28x = 316,631.04 × 191,314.56
  4. Step 4: Simplify right side
    211,001.28x = 60,576,128,099.94
  5. Step 5: Solve for x
    x = 60,576,128,099.94/211,001.28
  6. Step 6: Final answer
    x = 287,088.91

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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.