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Finding the Fourth Proportional to 445,111.20, 667,666.80 and 429,364.80

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Solution

The fourth proportional to 445,111.20, 667,666.80 and 429,364.80 is: 644,047.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,111.20 : 667,666.80 = 429,364.80 : x
  2. Step 2: Convert to fraction form
    445,111.20/667,666.80 = 429,364.80/x
  3. Step 3: Cross multiply
    445,111.20x = 667,666.80 × 429,364.80
  4. Step 4: Simplify right side
    445,111.20x = 286,672,622,048.64
  5. Step 5: Solve for x
    x = 286,672,622,048.64/445,111.20
  6. Step 6: Final answer
    x = 644,047.20

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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.