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Finding the Fourth Proportional to 291,491.25, 402,432.89 and 191,064.21

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Solution

The fourth proportional to 291,491.25, 402,432.89 and 191,064.21 is: 263,783.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,491.25 : 402,432.89 = 191,064.21 : x
  2. Step 2: Convert to fraction form
    291,491.25/402,432.89 = 191,064.21/x
  3. Step 3: Cross multiply
    291,491.25x = 402,432.89 × 191,064.21
  4. Step 4: Simplify right side
    291,491.25x = 76,890,521,250.55
  5. Step 5: Solve for x
    x = 76,890,521,250.55/291,491.25
  6. Step 6: Final answer
    x = 263,783.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.