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Finding the Fourth Proportional to 287,573.70, 431,360.55 and 236,835.30

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Solution

The fourth proportional to 287,573.70, 431,360.55 and 236,835.30 is: 355,252.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,573.70 : 431,360.55 = 236,835.30 : x
  2. Step 2: Convert to fraction form
    287,573.70/431,360.55 = 236,835.30/x
  3. Step 3: Cross multiply
    287,573.70x = 431,360.55 × 236,835.30
  4. Step 4: Simplify right side
    287,573.70x = 102,161,405,267.42
  5. Step 5: Solve for x
    x = 102,161,405,267.42/287,573.70
  6. Step 6: Final answer
    x = 355,252.95

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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.