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Finding the Fourth Proportional to 286,597.50, 429,905.82 and 128,826.41

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Solution

The fourth proportional to 286,597.50, 429,905.82 and 128,826.41 is: 193,243.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,597.50 : 429,905.82 = 128,826.41 : x
  2. Step 2: Convert to fraction form
    286,597.50/429,905.82 = 128,826.41/x
  3. Step 3: Cross multiply
    286,597.50x = 429,905.82 × 128,826.41
  4. Step 4: Simplify right side
    286,597.50x = 55,383,223,428.71
  5. Step 5: Solve for x
    x = 55,383,223,428.71/286,597.50
  6. Step 6: Final answer
    x = 193,243.92

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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.