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Finding the Fourth Proportional to 661,006.80, 912,189.72 and 359,200.80

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Solution

The fourth proportional to 661,006.80, 912,189.72 and 359,200.80 is: 495,697.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,006.80 : 912,189.72 = 359,200.80 : x
  2. Step 2: Convert to fraction form
    661,006.80/912,189.72 = 359,200.80/x
  3. Step 3: Cross multiply
    661,006.80x = 912,189.72 × 359,200.80
  4. Step 4: Simplify right side
    661,006.80x = 327,659,277,175.78
  5. Step 5: Solve for x
    x = 327,659,277,175.78/661,006.80
  6. Step 6: Final answer
    x = 495,697.29

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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.