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Finding the Fourth Proportional to 663,609.56, 915,860.28 and 418,949.84

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Solution

The fourth proportional to 663,609.56, 915,860.28 and 418,949.84 is: 578,200.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,609.56 : 915,860.28 = 418,949.84 : x
  2. Step 2: Convert to fraction form
    663,609.56/915,860.28 = 418,949.84/x
  3. Step 3: Cross multiply
    663,609.56x = 915,860.28 × 418,949.84
  4. Step 4: Simplify right side
    663,609.56x = 383,699,517,768.36
  5. Step 5: Solve for x
    x = 383,699,517,768.36/663,609.56
  6. Step 6: Final answer
    x = 578,200.71

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1.5x scale

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.