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Finding the Fourth Proportional to 389,420.40, 584,284.20 and 152,722.80

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Solution

The fourth proportional to 389,420.40, 584,284.20 and 152,722.80 is: 229,144.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,420.40 : 584,284.20 = 152,722.80 : x
  2. Step 2: Convert to fraction form
    389,420.40/584,284.20 = 152,722.80/x
  3. Step 3: Cross multiply
    389,420.40x = 584,284.20 × 152,722.80
  4. Step 4: Simplify right side
    389,420.40x = 89,233,519,019.76
  5. Step 5: Solve for x
    x = 89,233,519,019.76/389,420.40
  6. Step 6: Final answer
    x = 229,144.44

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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.