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Finding the Fourth Proportional to 661,509.82, 912,772.89 and 389,631.85

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Solution

The fourth proportional to 661,509.82, 912,772.89 and 389,631.85 is: 537,626.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,509.82 : 912,772.89 = 389,631.85 : x
  2. Step 2: Convert to fraction form
    661,509.82/912,772.89 = 389,631.85/x
  3. Step 3: Cross multiply
    661,509.82x = 912,772.89 × 389,631.85
  4. Step 4: Simplify right side
    661,509.82x = 355,645,389,760.55
  5. Step 5: Solve for x
    x = 355,645,389,760.55/661,509.82
  6. Step 6: Final answer
    x = 537,626.77

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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.