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Finding the Fourth Proportional to 280,985.80, 387,642.79 and 184,212.89

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Solution

The fourth proportional to 280,985.80, 387,642.79 and 184,212.89 is: 254,136.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,985.80 : 387,642.79 = 184,212.89 : x
  2. Step 2: Convert to fraction form
    280,985.80/387,642.79 = 184,212.89/x
  3. Step 3: Cross multiply
    280,985.80x = 387,642.79 × 184,212.89
  4. Step 4: Simplify right side
    280,985.80x = 71,408,798,633.56
  5. Step 5: Solve for x
    x = 71,408,798,633.56/280,985.80
  6. Step 6: Final answer
    x = 254,136.68

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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.