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Finding the Fourth Proportional to 660,994.89, 912,172.92 and 359,188.89

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Solution

The fourth proportional to 660,994.89, 912,172.92 and 359,188.89 is: 495,680.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,994.89 : 912,172.92 = 359,188.89 : x
  2. Step 2: Convert to fraction form
    660,994.89/912,172.92 = 359,188.89/x
  3. Step 3: Cross multiply
    660,994.89x = 912,172.92 × 359,188.89
  4. Step 4: Simplify right side
    660,994.89x = 327,642,378,622.86
  5. Step 5: Solve for x
    x = 327,642,378,622.86/660,994.89
  6. Step 6: Final answer
    x = 495,680.65

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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.