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Finding the Fourth Proportional to 716,444.45, 988,691.85 and 394,153.77

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Solution

The fourth proportional to 716,444.45, 988,691.85 and 394,153.77 is: 543,931.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,444.45 : 988,691.85 = 394,153.77 : x
  2. Step 2: Convert to fraction form
    716,444.45/988,691.85 = 394,153.77/x
  3. Step 3: Cross multiply
    716,444.45x = 988,691.85 × 394,153.77
  4. Step 4: Simplify right side
    716,444.45x = 389,696,620,045.78
  5. Step 5: Solve for x
    x = 389,696,620,045.78/716,444.45
  6. Step 6: Final answer
    x = 543,931.39

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Double scale
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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.