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Finding the Fourth Proportional to 387,877.34, 535,267.23 and 218,112.68

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Solution

The fourth proportional to 387,877.34, 535,267.23 and 218,112.68 is: 300,993.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,877.34 : 535,267.23 = 218,112.68 : x
  2. Step 2: Convert to fraction form
    387,877.34/535,267.23 = 218,112.68/x
  3. Step 3: Cross multiply
    387,877.34x = 535,267.23 × 218,112.68
  4. Step 4: Simplify right side
    387,877.34x = 116,748,570,051.48
  5. Step 5: Solve for x
    x = 116,748,570,051.48/387,877.34
  6. Step 6: Final answer
    x = 300,993.53

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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.