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Finding the Fourth Proportional to 676,457.01, 933,508.62 and 389,974.59

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Solution

The fourth proportional to 676,457.01, 933,508.62 and 389,974.59 is: 538,163.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    676,457.01 : 933,508.62 = 389,974.59 : x
  2. Step 2: Convert to fraction form
    676,457.01/933,508.62 = 389,974.59/x
  3. Step 3: Cross multiply
    676,457.01x = 933,508.62 × 389,974.59
  4. Step 4: Simplify right side
    676,457.01x = 364,044,641,345.97
  5. Step 5: Solve for x
    x = 364,044,641,345.97/676,457.01
  6. Step 6: Final answer
    x = 538,163.75

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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.