Home / 716,129.16-988,238.44-393,839.20

Finding the Fourth Proportional to 716,129.16, 988,238.44 and 393,839.20

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Solution

The fourth proportional to 716,129.16, 988,238.44 and 393,839.20 is: 543,487.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,129.16 : 988,238.44 = 393,839.20 : x
  2. Step 2: Convert to fraction form
    716,129.16/988,238.44 = 393,839.20/x
  3. Step 3: Cross multiply
    716,129.16x = 988,238.44 × 393,839.20
  4. Step 4: Simplify right side
    716,129.16x = 389,207,036,618.85
  5. Step 5: Solve for x
    x = 389,207,036,618.85/716,129.16
  6. Step 6: Final answer
    x = 543,487.21

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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.