Home / 429,453.98-643,916.39-145,117.66

Finding the Fourth Proportional to 429,453.98, 643,916.39 and 145,117.66

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Solution

The fourth proportional to 429,453.98, 643,916.39 and 145,117.66 is: 217,587.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,453.98 : 643,916.39 = 145,117.66 : x
  2. Step 2: Convert to fraction form
    429,453.98/643,916.39 = 145,117.66/x
  3. Step 3: Cross multiply
    429,453.98x = 643,916.39 × 145,117.66
  4. Step 4: Simplify right side
    429,453.98x = 93,443,639,752.45
  5. Step 5: Solve for x
    x = 93,443,639,752.45/429,453.98
  6. Step 6: Final answer
    x = 217,587.09

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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.