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Finding the Fourth Proportional to 389,630.30, 584,445.46 and 319,588.70

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Solution

The fourth proportional to 389,630.30, 584,445.46 and 319,588.70 is: 479,383.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,630.30 : 584,445.46 = 319,588.70 : x
  2. Step 2: Convert to fraction form
    389,630.30/584,445.46 = 319,588.70/x
  3. Step 3: Cross multiply
    389,630.30x = 584,445.46 × 319,588.70
  4. Step 4: Simplify right side
    389,630.30x = 186,782,164,782.30
  5. Step 5: Solve for x
    x = 186,782,164,782.30/389,630.30
  6. Step 6: Final answer
    x = 479,383.06

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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.