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Finding the Fourth Proportional to 456,721.80, 685,082.70 and 456,721.80

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Solution

The fourth proportional to 456,721.80, 685,082.70 and 456,721.80 is: 685,082.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,721.80 : 685,082.70 = 456,721.80 : x
  2. Step 2: Convert to fraction form
    456,721.80/685,082.70 = 456,721.80/x
  3. Step 3: Cross multiply
    456,721.80x = 685,082.70 × 456,721.80
  4. Step 4: Simplify right side
    456,721.80x = 312,892,203,892.86
  5. Step 5: Solve for x
    x = 312,892,203,892.86/456,721.80
  6. Step 6: Final answer
    x = 685,082.70

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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.