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Finding the Fourth Proportional to 421,505.27, 631,611.52 and 286,397.27

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Solution

The fourth proportional to 421,505.27, 631,611.52 and 286,397.27 is: 429,156.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,505.27 : 631,611.52 = 286,397.27 : x
  2. Step 2: Convert to fraction form
    421,505.27/631,611.52 = 286,397.27/x
  3. Step 3: Cross multiply
    421,505.27x = 631,611.52 × 286,397.27
  4. Step 4: Simplify right side
    421,505.27x = 180,891,811,154.50
  5. Step 5: Solve for x
    x = 180,891,811,154.50/421,505.27
  6. Step 6: Final answer
    x = 429,156.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.