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Finding the Fourth Proportional to 455,816.13, 628,617.65 and 379,587.65

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Solution

The fourth proportional to 455,816.13, 628,617.65 and 379,587.65 is: 523,490.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,816.13 : 628,617.65 = 379,587.65 : x
  2. Step 2: Convert to fraction form
    455,816.13/628,617.65 = 379,587.65/x
  3. Step 3: Cross multiply
    455,816.13x = 628,617.65 × 379,587.65
  4. Step 4: Simplify right side
    455,816.13x = 238,615,491,471.00
  5. Step 5: Solve for x
    x = 238,615,491,471.00/455,816.13
  6. Step 6: Final answer
    x = 523,490.67

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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.