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Finding the Fourth Proportional to 935,689, 1,291,172.34 and 553,648.84

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Solution

The fourth proportional to 935,689, 1,291,172.34 and 553,648.84 is: 763,988.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    935,689 : 1,291,172.34 = 553,648.84 : x
  2. Step 2: Convert to fraction form
    935,689/1,291,172.34 = 553,648.84/x
  3. Step 3: Cross multiply
    935,689x = 1,291,172.34 × 553,648.84
  4. Step 4: Simplify right side
    935,689x = 714,856,068,281.09
  5. Step 5: Solve for x
    x = 714,856,068,281.09/935,689
  6. Step 6: Final answer
    x = 763,988.96

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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.