Home / 478,923.45-660,930.31-285,304.70

Finding the Fourth Proportional to 478,923.45, 660,930.31 and 285,304.70

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Solution

The fourth proportional to 478,923.45, 660,930.31 and 285,304.70 is: 393,729.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,923.45 : 660,930.31 = 285,304.70 : x
  2. Step 2: Convert to fraction form
    478,923.45/660,930.31 = 285,304.70/x
  3. Step 3: Cross multiply
    478,923.45x = 660,930.31 × 285,304.70
  4. Step 4: Simplify right side
    478,923.45x = 188,566,521,304.26
  5. Step 5: Solve for x
    x = 188,566,521,304.26/478,923.45
  6. Step 6: Final answer
    x = 393,729.98

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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.