Home / 387,972.48-535,396.89-218,206.61

Finding the Fourth Proportional to 387,972.48, 535,396.89 and 218,206.61

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Solution

The fourth proportional to 387,972.48, 535,396.89 and 218,206.61 is: 301,122.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,972.48 : 535,396.89 = 218,206.61 : x
  2. Step 2: Convert to fraction form
    387,972.48/535,396.89 = 218,206.61/x
  3. Step 3: Cross multiply
    387,972.48x = 535,396.89 × 218,206.61
  4. Step 4: Simplify right side
    387,972.48x = 116,827,139,293.06
  5. Step 5: Solve for x
    x = 116,827,139,293.06/387,972.48
  6. Step 6: Final answer
    x = 301,122.23

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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.