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Finding the Fourth Proportional to 663,445.22, 915,525.41 and 405,754.65

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Solution

The fourth proportional to 663,445.22, 915,525.41 and 405,754.65 is: 559,923.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,445.22 : 915,525.41 = 405,754.65 : x
  2. Step 2: Convert to fraction form
    663,445.22/915,525.41 = 405,754.65/x
  3. Step 3: Cross multiply
    663,445.22x = 915,525.41 × 405,754.65
  4. Step 4: Simplify right side
    663,445.22x = 371,478,690,271.88
  5. Step 5: Solve for x
    x = 371,478,690,271.88/663,445.22
  6. Step 6: Final answer
    x = 559,923.69

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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.