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Finding the Fourth Proportional to 393,542.80, 590,314.19 and 374,421.13

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Solution

The fourth proportional to 393,542.80, 590,314.19 and 374,421.13 is: 561,631.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,542.80 : 590,314.19 = 374,421.13 : x
  2. Step 2: Convert to fraction form
    393,542.80/590,314.19 = 374,421.13/x
  3. Step 3: Cross multiply
    393,542.80x = 590,314.19 × 374,421.13
  4. Step 4: Simplify right side
    393,542.80x = 221,026,106,074.84
  5. Step 5: Solve for x
    x = 221,026,106,074.84/393,542.80
  6. Step 6: Final answer
    x = 561,631.69

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.