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Finding the Fourth Proportional to 472,821.20, 709,692.60 and 236,430.80

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Solution

The fourth proportional to 472,821.20, 709,692.60 and 236,430.80 is: 354,876.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    472,821.20 : 709,692.60 = 236,430.80 : x
  2. Step 2: Convert to fraction form
    472,821.20/709,692.60 = 236,430.80/x
  3. Step 3: Cross multiply
    472,821.20x = 709,692.60 × 236,430.80
  4. Step 4: Simplify right side
    472,821.20x = 167,793,189,172.08
  5. Step 5: Solve for x
    x = 167,793,189,172.08/472,821.20
  6. Step 6: Final answer
    x = 354,876.62

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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.