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Finding the Fourth Proportional to 285,380.47, 393,809.81 and 156,312.27

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Solution

The fourth proportional to 285,380.47, 393,809.81 and 156,312.27 is: 215,702.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,380.47 : 393,809.81 = 156,312.27 : x
  2. Step 2: Convert to fraction form
    285,380.47/393,809.81 = 156,312.27/x
  3. Step 3: Cross multiply
    285,380.47x = 393,809.81 × 156,312.27
  4. Step 4: Simplify right side
    285,380.47x = 61,557,305,740.15
  5. Step 5: Solve for x
    x = 61,557,305,740.15/285,380.47
  6. Step 6: Final answer
    x = 215,702.59

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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.