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Finding the Fourth Proportional to 429,999.70, 644,999.55 and 272,406.10

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Solution

The fourth proportional to 429,999.70, 644,999.55 and 272,406.10 is: 408,609.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,999.70 : 644,999.55 = 272,406.10 : x
  2. Step 2: Convert to fraction form
    429,999.70/644,999.55 = 272,406.10/x
  3. Step 3: Cross multiply
    429,999.70x = 644,999.55 × 272,406.10
  4. Step 4: Simplify right side
    429,999.70x = 175,701,811,917.26
  5. Step 5: Solve for x
    x = 175,701,811,917.26/429,999.70
  6. Step 6: Final answer
    x = 408,609.15

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1.5x scale

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.