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Finding the Fourth Proportional to 716,129.04, 988,261.65 and 393,859.74

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Solution

The fourth proportional to 716,129.04, 988,261.65 and 393,859.74 is: 543,528.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,129.04 : 988,261.65 = 393,859.74 : x
  2. Step 2: Convert to fraction form
    716,129.04/988,261.65 = 393,859.74/x
  3. Step 3: Cross multiply
    716,129.04x = 988,261.65 × 393,859.74
  4. Step 4: Simplify right side
    716,129.04x = 389,236,476,520.97
  5. Step 5: Solve for x
    x = 389,236,476,520.97/716,129.04
  6. Step 6: Final answer
    x = 543,528.41

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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.