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Finding the Fourth Proportional to 990,073.86, 1,484,872.86 and 457,082.94

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Solution

The fourth proportional to 990,073.86, 1,484,872.86 and 457,082.94 is: 685,514.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,073.86 : 1,484,872.86 = 457,082.94 : x
  2. Step 2: Convert to fraction form
    990,073.86/1,484,872.86 = 457,082.94/x
  3. Step 3: Cross multiply
    990,073.86x = 1,484,872.86 × 457,082.94
  4. Step 4: Simplify right side
    990,073.86x = 678,710,052,375.01
  5. Step 5: Solve for x
    x = 678,710,052,375.01/990,073.86
  6. Step 6: Final answer
    x = 685,514.57

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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.