Home / 389,905.70-584,455.35-212,036.90

Finding the Fourth Proportional to 389,905.70, 584,455.35 and 212,036.90

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Solution

The fourth proportional to 389,905.70, 584,455.35 and 212,036.90 is: 317,836.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,905.70 : 584,455.35 = 212,036.90 : x
  2. Step 2: Convert to fraction form
    389,905.70/584,455.35 = 212,036.90/x
  3. Step 3: Cross multiply
    389,905.70x = 584,455.35 × 212,036.90
  4. Step 4: Simplify right side
    389,905.70x = 123,926,100,602.42
  5. Step 5: Solve for x
    x = 123,926,100,602.42/389,905.70
  6. Step 6: Final answer
    x = 317,836.08

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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.