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Finding the Fourth Proportional to 661,011.30, 912,201.30 and 359,205.30

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Solution

The fourth proportional to 661,011.30, 912,201.30 and 359,205.30 is: 495,706.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,011.30 : 912,201.30 = 359,205.30 : x
  2. Step 2: Convert to fraction form
    661,011.30/912,201.30 = 359,205.30/x
  3. Step 3: Cross multiply
    661,011.30x = 912,201.30 × 359,205.30
  4. Step 4: Simplify right side
    661,011.30x = 327,667,541,626.89
  5. Step 5: Solve for x
    x = 327,667,541,626.89/661,011.30
  6. Step 6: Final answer
    x = 495,706.41

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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.