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Finding the Fourth Proportional to 663,298.96, 915,355.66 and 376,834.78

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Solution

The fourth proportional to 663,298.96, 915,355.66 and 376,834.78 is: 520,033.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,298.96 : 915,355.66 = 376,834.78 : x
  2. Step 2: Convert to fraction form
    663,298.96/915,355.66 = 376,834.78/x
  3. Step 3: Cross multiply
    663,298.96x = 915,355.66 × 376,834.78
  4. Step 4: Simplify right side
    663,298.96x = 344,937,848,757.86
  5. Step 5: Solve for x
    x = 344,937,848,757.86/663,298.96
  6. Step 6: Final answer
    x = 520,033.75

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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.