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Finding the Fourth Proportional to 430,879.91, 593,330.37 and 421,320.89

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Solution

The fourth proportional to 430,879.91, 593,330.37 and 421,320.89 is: 580,167.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,879.91 : 593,330.37 = 421,320.89 : x
  2. Step 2: Convert to fraction form
    430,879.91/593,330.37 = 421,320.89/x
  3. Step 3: Cross multiply
    430,879.91x = 593,330.37 × 421,320.89
  4. Step 4: Simplify right side
    430,879.91x = 249,982,479,455.80
  5. Step 5: Solve for x
    x = 249,982,479,455.80/430,879.91
  6. Step 6: Final answer
    x = 580,167.41

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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.