Home / 389,582.80-584,374.20-212,435.80

Finding the Fourth Proportional to 389,582.80, 584,374.20 and 212,435.80

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Solution

The fourth proportional to 389,582.80, 584,374.20 and 212,435.80 is: 318,653.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,582.80 : 584,374.20 = 212,435.80 : x
  2. Step 2: Convert to fraction form
    389,582.80/584,374.20 = 212,435.80/x
  3. Step 3: Cross multiply
    389,582.80x = 584,374.20 × 212,435.80
  4. Step 4: Simplify right side
    389,582.80x = 124,142,000,676.36
  5. Step 5: Solve for x
    x = 124,142,000,676.36/389,582.80
  6. Step 6: Final answer
    x = 318,653.70

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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.