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Finding the Fourth Proportional to 616,640.68, 851,101.32 and 374,872

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Solution

The fourth proportional to 616,640.68, 851,101.32 and 374,872 is: 517,406.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    616,640.68 : 851,101.32 = 374,872 : x
  2. Step 2: Convert to fraction form
    616,640.68/851,101.32 = 374,872/x
  3. Step 3: Cross multiply
    616,640.68x = 851,101.32 × 374,872
  4. Step 4: Simplify right side
    616,640.68x = 319,054,054,031.04
  5. Step 5: Solve for x
    x = 319,054,054,031.04/616,640.68
  6. Step 6: Final answer
    x = 517,406.76

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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.