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Finding the Fourth Proportional to 489,613.19, 675,492.98 and 319,945.73

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Solution

The fourth proportional to 489,613.19, 675,492.98 and 319,945.73 is: 441,411.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,613.19 : 675,492.98 = 319,945.73 : x
  2. Step 2: Convert to fraction form
    489,613.19/675,492.98 = 319,945.73/x
  3. Step 3: Cross multiply
    489,613.19x = 675,492.98 × 319,945.73
  4. Step 4: Simplify right side
    489,613.19x = 216,121,089,618.78
  5. Step 5: Solve for x
    x = 216,121,089,618.78/489,613.19
  6. Step 6: Final answer
    x = 441,411.91

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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.