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Finding the Fourth Proportional to 279,745.16, 386,043.46 and 152,421.80

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Solution

The fourth proportional to 279,745.16, 386,043.46 and 152,421.80 is: 210,339.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,745.16 : 386,043.46 = 152,421.80 : x
  2. Step 2: Convert to fraction form
    279,745.16/386,043.46 = 152,421.80/x
  3. Step 3: Cross multiply
    279,745.16x = 386,043.46 × 152,421.80
  4. Step 4: Simplify right side
    279,745.16x = 58,841,439,051.43
  5. Step 5: Solve for x
    x = 58,841,439,051.43/279,745.16
  6. Step 6: Final answer
    x = 210,339.44

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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.