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Finding the Fourth Proportional to 660,976.70, 912,161.32 and 359,190.14

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Solution

The fourth proportional to 660,976.70, 912,161.32 and 359,190.14 is: 495,689.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,976.70 : 912,161.32 = 359,190.14 : x
  2. Step 2: Convert to fraction form
    660,976.70/912,161.32 = 359,190.14/x
  3. Step 3: Cross multiply
    660,976.70x = 912,161.32 × 359,190.14
  4. Step 4: Simplify right side
    660,976.70x = 327,639,346,774.60
  5. Step 5: Solve for x
    x = 327,639,346,774.60/660,976.70
  6. Step 6: Final answer
    x = 495,689.71

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1.5x scale

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.