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Finding the Fourth Proportional to 663,300.10, 915,357.22 and 376,835.90

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Solution

The fourth proportional to 663,300.10, 915,357.22 and 376,835.90 is: 520,035.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,300.10 : 915,357.22 = 376,835.90 : x
  2. Step 2: Convert to fraction form
    663,300.10/915,357.22 = 376,835.90/x
  3. Step 3: Cross multiply
    663,300.10x = 915,357.22 × 376,835.90
  4. Step 4: Simplify right side
    663,300.10x = 344,939,461,820.20
  5. Step 5: Solve for x
    x = 344,939,461,820.20/663,300.10
  6. Step 6: Final answer
    x = 520,035.29

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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.