Home / 429,156.81-643,735.21-228,870.40

Finding the Fourth Proportional to 429,156.81, 643,735.21 and 228,870.40

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Solution

The fourth proportional to 429,156.81, 643,735.21 and 228,870.40 is: 343,305.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,156.81 : 643,735.21 = 228,870.40 : x
  2. Step 2: Convert to fraction form
    429,156.81/643,735.21 = 228,870.40/x
  3. Step 3: Cross multiply
    429,156.81x = 643,735.21 × 228,870.40
  4. Step 4: Simplify right side
    429,156.81x = 147,331,935,006.78
  5. Step 5: Solve for x
    x = 147,331,935,006.78/429,156.81
  6. Step 6: Final answer
    x = 343,305.60

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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.