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Finding the Fourth Proportional to 680,435.64, 938,610.05 and 425,343.96

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Solution

The fourth proportional to 680,435.64, 938,610.05 and 425,343.96 is: 586,730.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,435.64 : 938,610.05 = 425,343.96 : x
  2. Step 2: Convert to fraction form
    680,435.64/938,610.05 = 425,343.96/x
  3. Step 3: Cross multiply
    680,435.64x = 938,610.05 × 425,343.96
  4. Step 4: Simplify right side
    680,435.64x = 399,232,113,436.08
  5. Step 5: Solve for x
    x = 399,232,113,436.08/680,435.64
  6. Step 6: Final answer
    x = 586,730.16

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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.