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Finding the Fourth Proportional to 646,886.61, 892,713.29 and 371,290.05

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Solution

The fourth proportional to 646,886.61, 892,713.29 and 371,290.05 is: 512,385.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,886.61 : 892,713.29 = 371,290.05 : x
  2. Step 2: Convert to fraction form
    646,886.61/892,713.29 = 371,290.05/x
  3. Step 3: Cross multiply
    646,886.61x = 892,713.29 × 371,290.05
  4. Step 4: Simplify right side
    646,886.61x = 331,455,560,223.31
  5. Step 5: Solve for x
    x = 331,455,560,223.31/646,886.61
  6. Step 6: Final answer
    x = 512,385.87

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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.