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Finding the Fourth Proportional to 621,915.18, 931,003.92 and 556,951.86

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Solution

The fourth proportional to 621,915.18, 931,003.92 and 556,951.86 is: 833,754.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,915.18 : 931,003.92 = 556,951.86 : x
  2. Step 2: Convert to fraction form
    621,915.18/931,003.92 = 556,951.86/x
  3. Step 3: Cross multiply
    621,915.18x = 931,003.92 × 556,951.86
  4. Step 4: Simplify right side
    621,915.18x = 518,524,364,911.29
  5. Step 5: Solve for x
    x = 518,524,364,911.29/621,915.18
  6. Step 6: Final answer
    x = 833,754.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.