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Finding the Fourth Proportional to 429,742.76, 643,728.41 and 251,710.03

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Solution

The fourth proportional to 429,742.76, 643,728.41 and 251,710.03 is: 377,046.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,742.76 : 643,728.41 = 251,710.03 : x
  2. Step 2: Convert to fraction form
    429,742.76/643,728.41 = 251,710.03/x
  3. Step 3: Cross multiply
    429,742.76x = 643,728.41 × 251,710.03
  4. Step 4: Simplify right side
    429,742.76x = 162,032,892,915.76
  5. Step 5: Solve for x
    x = 162,032,892,915.76/429,742.76
  6. Step 6: Final answer
    x = 377,046.24

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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.