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Finding the Fourth Proportional to 378,089.47, 521,412.87 and 275,953.24

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Solution

The fourth proportional to 378,089.47, 521,412.87 and 275,953.24 is: 380,559.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,089.47 : 521,412.87 = 275,953.24 : x
  2. Step 2: Convert to fraction form
    378,089.47/521,412.87 = 275,953.24/x
  3. Step 3: Cross multiply
    378,089.47x = 521,412.87 × 275,953.24
  4. Step 4: Simplify right side
    378,089.47x = 143,885,570,854.20
  5. Step 5: Solve for x
    x = 143,885,570,854.20/378,089.47
  6. Step 6: Final answer
    x = 380,559.58

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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.