Home / 390,076.20-584,711.10-212,207.40

Finding the Fourth Proportional to 390,076.20, 584,711.10 and 212,207.40

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Solution

The fourth proportional to 390,076.20, 584,711.10 and 212,207.40 is: 318,091.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,076.20 : 584,711.10 = 212,207.40 : x
  2. Step 2: Convert to fraction form
    390,076.20/584,711.10 = 212,207.40/x
  3. Step 3: Cross multiply
    390,076.20x = 584,711.10 × 212,207.40
  4. Step 4: Simplify right side
    390,076.20x = 124,080,022,282.14
  5. Step 5: Solve for x
    x = 124,080,022,282.14/390,076.20
  6. Step 6: Final answer
    x = 318,091.75

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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.