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Finding the Fourth Proportional to 508,907.74, 702,293.34 and 279,479.86

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Solution

The fourth proportional to 508,907.74, 702,293.34 and 279,479.86 is: 385,682.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,907.74 : 702,293.34 = 279,479.86 : x
  2. Step 2: Convert to fraction form
    508,907.74/702,293.34 = 279,479.86/x
  3. Step 3: Cross multiply
    508,907.74x = 702,293.34 × 279,479.86
  4. Step 4: Simplify right side
    508,907.74x = 196,276,844,342.13
  5. Step 5: Solve for x
    x = 196,276,844,342.13/508,907.74
  6. Step 6: Final answer
    x = 385,682.57

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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.