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Finding the Fourth Proportional to 680,488.32, 938,682.36 and 425,396.64

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Solution

The fourth proportional to 680,488.32, 938,682.36 and 425,396.64 is: 586,802.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,488.32 : 938,682.36 = 425,396.64 : x
  2. Step 2: Convert to fraction form
    680,488.32/938,682.36 = 425,396.64/x
  3. Step 3: Cross multiply
    680,488.32x = 938,682.36 × 425,396.64
  4. Step 4: Simplify right side
    680,488.32x = 399,312,321,971.27
  5. Step 5: Solve for x
    x = 399,312,321,971.27/680,488.32
  6. Step 6: Final answer
    x = 586,802.61

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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.