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Finding the Fourth Proportional to 426,573.81, 639,977.61 and 186,644.22

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Solution

The fourth proportional to 426,573.81, 639,977.61 and 186,644.22 is: 280,017.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,573.81 : 639,977.61 = 186,644.22 : x
  2. Step 2: Convert to fraction form
    426,573.81/639,977.61 = 186,644.22/x
  3. Step 3: Cross multiply
    426,573.81x = 639,977.61 × 186,644.22
  4. Step 4: Simplify right side
    426,573.81x = 119,448,117,702.81
  5. Step 5: Solve for x
    x = 119,448,117,702.81/426,573.81
  6. Step 6: Final answer
    x = 280,017.47

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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.