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Finding the Fourth Proportional to 387,190, 534,090.54 and 243,700.93

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Solution

The fourth proportional to 387,190, 534,090.54 and 243,700.93 is: 336,161.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,190 : 534,090.54 = 243,700.93 : x
  2. Step 2: Convert to fraction form
    387,190/534,090.54 = 243,700.93/x
  3. Step 3: Cross multiply
    387,190x = 534,090.54 × 243,700.93
  4. Step 4: Simplify right side
    387,190x = 130,158,361,302.20
  5. Step 5: Solve for x
    x = 130,158,361,302.20/387,190
  6. Step 6: Final answer
    x = 336,161.47

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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.