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Finding the Fourth Proportional to 663,018.85, 994,085.40 and 207,455.81

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Solution

The fourth proportional to 663,018.85, 994,085.40 and 207,455.81 is: 311,045.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,018.85 : 994,085.40 = 207,455.81 : x
  2. Step 2: Convert to fraction form
    663,018.85/994,085.40 = 207,455.81/x
  3. Step 3: Cross multiply
    663,018.85x = 994,085.40 × 207,455.81
  4. Step 4: Simplify right side
    663,018.85x = 206,228,791,866.17
  5. Step 5: Solve for x
    x = 206,228,791,866.17/663,018.85
  6. Step 6: Final answer
    x = 311,045.14

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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.