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Finding the Fourth Proportional to 716,238.99, 988,410.32 and 393,973.61

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Solution

The fourth proportional to 716,238.99, 988,410.32 and 393,973.61 is: 543,683.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,238.99 : 988,410.32 = 393,973.61 : x
  2. Step 2: Convert to fraction form
    716,238.99/988,410.32 = 393,973.61/x
  3. Step 3: Cross multiply
    716,238.99x = 988,410.32 × 393,973.61
  4. Step 4: Simplify right side
    716,238.99x = 389,407,577,490.76
  5. Step 5: Solve for x
    x = 389,407,577,490.76/716,238.99
  6. Step 6: Final answer
    x = 543,683.86

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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.