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Finding the Fourth Proportional to 663,639.55, 915,900.32 and 377,202.68

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Solution

The fourth proportional to 663,639.55, 915,900.32 and 377,202.68 is: 520,583.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,639.55 : 915,900.32 = 377,202.68 : x
  2. Step 2: Convert to fraction form
    663,639.55/915,900.32 = 377,202.68/x
  3. Step 3: Cross multiply
    663,639.55x = 915,900.32 × 377,202.68
  4. Step 4: Simplify right side
    663,639.55x = 345,480,053,430.84
  5. Step 5: Solve for x
    x = 345,480,053,430.84/663,639.55
  6. Step 6: Final answer
    x = 520,583.89

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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.