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Finding the Fourth Proportional to 666,430.80, 998,771.40 and 266,744.40

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Solution

The fourth proportional to 666,430.80, 998,771.40 and 266,744.40 is: 399,766.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,430.80 : 998,771.40 = 266,744.40 : x
  2. Step 2: Convert to fraction form
    666,430.80/998,771.40 = 266,744.40/x
  3. Step 3: Cross multiply
    666,430.80x = 998,771.40 × 266,744.40
  4. Step 4: Simplify right side
    666,430.80x = 266,416,677,830.16
  5. Step 5: Solve for x
    x = 266,416,677,830.16/666,430.80
  6. Step 6: Final answer
    x = 399,766.45

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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.