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Finding the Fourth Proportional to 289,397.10, 434,112.05 and 89,745.87

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Solution

The fourth proportional to 289,397.10, 434,112.05 and 89,745.87 is: 134,623.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,397.10 : 434,112.05 = 89,745.87 : x
  2. Step 2: Convert to fraction form
    289,397.10/434,112.05 = 89,745.87/x
  3. Step 3: Cross multiply
    289,397.10x = 434,112.05 × 89,745.87
  4. Step 4: Simplify right side
    289,397.10x = 38,959,761,541.79
  5. Step 5: Solve for x
    x = 38,959,761,541.79/289,397.10
  6. Step 6: Final answer
    x = 134,623.89

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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.