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Finding the Fourth Proportional to 661,258.66, 911,692.27 and 428,274.04

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Solution

The fourth proportional to 661,258.66, 911,692.27 and 428,274.04 is: 590,471.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,258.66 : 911,692.27 = 428,274.04 : x
  2. Step 2: Convert to fraction form
    661,258.66/911,692.27 = 428,274.04/x
  3. Step 3: Cross multiply
    661,258.66x = 911,692.27 × 428,274.04
  4. Step 4: Simplify right side
    661,258.66x = 390,454,131,709.67
  5. Step 5: Solve for x
    x = 390,454,131,709.67/661,258.66
  6. Step 6: Final answer
    x = 590,471.11

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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.