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Finding the Fourth Proportional to 389,950.40, 584,925.60 and 263,979.20

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Solution

The fourth proportional to 389,950.40, 584,925.60 and 263,979.20 is: 395,968.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,950.40 : 584,925.60 = 263,979.20 : x
  2. Step 2: Convert to fraction form
    389,950.40/584,925.60 = 263,979.20/x
  3. Step 3: Cross multiply
    389,950.40x = 584,925.60 × 263,979.20
  4. Step 4: Simplify right side
    389,950.40x = 154,408,191,947.52
  5. Step 5: Solve for x
    x = 154,408,191,947.52/389,950.40
  6. Step 6: Final answer
    x = 395,968.80

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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.