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Finding the Fourth Proportional to 285,331.84, 393,749 and 156,264.64

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Solution

The fourth proportional to 285,331.84, 393,749 and 156,264.64 is: 215,640.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,331.84 : 393,749 = 156,264.64 : x
  2. Step 2: Convert to fraction form
    285,331.84/393,749 = 156,264.64/x
  3. Step 3: Cross multiply
    285,331.84x = 393,749 × 156,264.64
  4. Step 4: Simplify right side
    285,331.84x = 61,529,045,735.36
  5. Step 5: Solve for x
    x = 61,529,045,735.36/285,331.84
  6. Step 6: Final answer
    x = 215,640.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.