Home / 388,079.70-535,549.20-218,313.96

Finding the Fourth Proportional to 388,079.70, 535,549.20 and 218,313.96

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Solution

The fourth proportional to 388,079.70, 535,549.20 and 218,313.96 is: 301,272.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,079.70 : 535,549.20 = 218,313.96 : x
  2. Step 2: Convert to fraction form
    388,079.70/535,549.20 = 218,313.96/x
  3. Step 3: Cross multiply
    388,079.70x = 535,549.20 × 218,313.96
  4. Step 4: Simplify right side
    388,079.70x = 116,917,866,626.83
  5. Step 5: Solve for x
    x = 116,917,866,626.83/388,079.70
  6. Step 6: Final answer
    x = 301,272.82

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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.