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Finding the Fourth Proportional to 387,385.98, 580,746.17 and 134,633.63

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Solution

The fourth proportional to 387,385.98, 580,746.17 and 134,633.63 is: 201,834.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,385.98 : 580,746.17 = 134,633.63 : x
  2. Step 2: Convert to fraction form
    387,385.98/580,746.17 = 134,633.63/x
  3. Step 3: Cross multiply
    387,385.98x = 580,746.17 × 134,633.63
  4. Step 4: Simplify right side
    387,385.98x = 78,187,964,975.70
  5. Step 5: Solve for x
    x = 78,187,964,975.70/387,385.98
  6. Step 6: Final answer
    x = 201,834.78

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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.