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Finding the Fourth Proportional to 489,289.96, 674,595.30 and 316,903.48

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Solution

The fourth proportional to 489,289.96, 674,595.30 and 316,903.48 is: 436,922.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,289.96 : 674,595.30 = 316,903.48 : x
  2. Step 2: Convert to fraction form
    489,289.96/674,595.30 = 316,903.48/x
  3. Step 3: Cross multiply
    489,289.96x = 674,595.30 × 316,903.48
  4. Step 4: Simplify right side
    489,289.96x = 213,781,598,161.64
  5. Step 5: Solve for x
    x = 213,781,598,161.64/489,289.96
  6. Step 6: Final answer
    x = 436,922.10

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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.