Home / 389,929.62-585,080.40-212,432.70

Finding the Fourth Proportional to 389,929.62, 585,080.40 and 212,432.70

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Solution

The fourth proportional to 389,929.62, 585,080.40 and 212,432.70 is: 318,750.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,929.62 : 585,080.40 = 212,432.70 : x
  2. Step 2: Convert to fraction form
    389,929.62/585,080.40 = 212,432.70/x
  3. Step 3: Cross multiply
    389,929.62x = 585,080.40 × 212,432.70
  4. Step 4: Simplify right side
    389,929.62x = 124,290,209,089.08
  5. Step 5: Solve for x
    x = 124,290,209,089.08/389,929.62
  6. Step 6: Final answer
    x = 318,750.37

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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.