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Finding the Fourth Proportional to 387,018.60, 534,090.90 and 214,947.68

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Solution

The fourth proportional to 387,018.60, 534,090.90 and 214,947.68 is: 296,630.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,018.60 : 534,090.90 = 214,947.68 : x
  2. Step 2: Convert to fraction form
    387,018.60/534,090.90 = 214,947.68/x
  3. Step 3: Cross multiply
    387,018.60x = 534,090.90 × 214,947.68
  4. Step 4: Simplify right side
    387,018.60x = 114,801,599,864.11
  5. Step 5: Solve for x
    x = 114,801,599,864.11/387,018.60
  6. Step 6: Final answer
    x = 296,630.70

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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.