Home / 663,777-916,081.38-409,121.64

Finding the Fourth Proportional to 663,777, 916,081.38 and 409,121.64

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Solution

The fourth proportional to 663,777, 916,081.38 and 409,121.64 is: 564,630.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,777 : 916,081.38 = 409,121.64 : x
  2. Step 2: Convert to fraction form
    663,777/916,081.38 = 409,121.64/x
  3. Step 3: Cross multiply
    663,777x = 916,081.38 × 409,121.64
  4. Step 4: Simplify right side
    663,777x = 374,788,716,559.06
  5. Step 5: Solve for x
    x = 374,788,716,559.06/663,777
  6. Step 6: Final answer
    x = 564,630.47

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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.