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Finding the Fourth Proportional to 421,458.72, 581,594.52 and 240,209.88

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Solution

The fourth proportional to 421,458.72, 581,594.52 and 240,209.88 is: 331,479.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,458.72 : 581,594.52 = 240,209.88 : x
  2. Step 2: Convert to fraction form
    421,458.72/581,594.52 = 240,209.88/x
  3. Step 3: Cross multiply
    421,458.72x = 581,594.52 × 240,209.88
  4. Step 4: Simplify right side
    421,458.72x = 139,704,749,857.86
  5. Step 5: Solve for x
    x = 139,704,749,857.86/421,458.72
  6. Step 6: Final answer
    x = 331,479.08

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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.