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Finding the Fourth Proportional to 1,558,778, 2,151,113.64 and 843,386

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Solution

The fourth proportional to 1,558,778, 2,151,113.64 and 843,386 is: 1,163,872.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,558,778 : 2,151,113.64 = 843,386 : x
  2. Step 2: Convert to fraction form
    1,558,778/2,151,113.64 = 843,386/x
  3. Step 3: Cross multiply
    1,558,778x = 2,151,113.64 × 843,386
  4. Step 4: Simplify right side
    1,558,778x = 1,814,219,128,385.04
  5. Step 5: Solve for x
    x = 1,814,219,128,385.04/1,558,778
  6. Step 6: Final answer
    x = 1,163,872.68

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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.