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Finding the Fourth Proportional to 587,479.50, 810,726.66 and 319,207.50

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Solution

The fourth proportional to 587,479.50, 810,726.66 and 319,207.50 is: 440,509.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    587,479.50 : 810,726.66 = 319,207.50 : x
  2. Step 2: Convert to fraction form
    587,479.50/810,726.66 = 319,207.50/x
  3. Step 3: Cross multiply
    587,479.50x = 810,726.66 × 319,207.50
  4. Step 4: Simplify right side
    587,479.50x = 258,790,030,321.95
  5. Step 5: Solve for x
    x = 258,790,030,321.95/587,479.50
  6. Step 6: Final answer
    x = 440,509.04

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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.