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Finding the Fourth Proportional to 617,128.86, 925,360.45 and 279,985.57

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Solution

The fourth proportional to 617,128.86, 925,360.45 and 279,985.57 is: 419,827.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,128.86 : 925,360.45 = 279,985.57 : x
  2. Step 2: Convert to fraction form
    617,128.86/925,360.45 = 279,985.57/x
  3. Step 3: Cross multiply
    617,128.86x = 925,360.45 × 279,985.57
  4. Step 4: Simplify right side
    617,128.86x = 259,087,573,048.71
  5. Step 5: Solve for x
    x = 259,087,573,048.71/617,128.86
  6. Step 6: Final answer
    x = 419,827.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.