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Finding the Fourth Proportional to 387,875.08, 535,264.26 and 218,105.56

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Solution

The fourth proportional to 387,875.08, 535,264.26 and 218,105.56 is: 300,983.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,875.08 : 535,264.26 = 218,105.56 : x
  2. Step 2: Convert to fraction form
    387,875.08/535,264.26 = 218,105.56/x
  3. Step 3: Cross multiply
    387,875.08x = 535,264.26 × 218,105.56
  4. Step 4: Simplify right side
    387,875.08x = 116,744,111,175.29
  5. Step 5: Solve for x
    x = 116,744,111,175.29/387,875.08
  6. Step 6: Final answer
    x = 300,983.79

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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.