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Finding the Fourth Proportional to 387,960.76, 535,385.73 and 218,194.75

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Solution

The fourth proportional to 387,960.76, 535,385.73 and 218,194.75 is: 301,108.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,960.76 : 535,385.73 = 218,194.75 : x
  2. Step 2: Convert to fraction form
    387,960.76/535,385.73 = 218,194.75/x
  3. Step 3: Cross multiply
    387,960.76x = 535,385.73 × 218,194.75
  4. Step 4: Simplify right side
    387,960.76x = 116,818,355,510.92
  5. Step 5: Solve for x
    x = 116,818,355,510.92/387,960.76
  6. Step 6: Final answer
    x = 301,108.69

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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.