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Finding the Fourth Proportional to 663,772, 916,074.48 and 409,116.64

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Solution

The fourth proportional to 663,772, 916,074.48 and 409,116.64 is: 564,623.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,772 : 916,074.48 = 409,116.64 : x
  2. Step 2: Convert to fraction form
    663,772/916,074.48 = 409,116.64/x
  3. Step 3: Cross multiply
    663,772x = 916,074.48 × 409,116.64
  4. Step 4: Simplify right side
    663,772x = 374,781,313,247.35
  5. Step 5: Solve for x
    x = 374,781,313,247.35/663,772
  6. Step 6: Final answer
    x = 564,623.57

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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.