Home / 389,926.20-584,486.10-212,057.40

Finding the Fourth Proportional to 389,926.20, 584,486.10 and 212,057.40

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Solution

The fourth proportional to 389,926.20, 584,486.10 and 212,057.40 is: 317,866.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,926.20 : 584,486.10 = 212,057.40 : x
  2. Step 2: Convert to fraction form
    389,926.20/584,486.10 = 212,057.40/x
  3. Step 3: Cross multiply
    389,926.20x = 584,486.10 × 212,057.40
  4. Step 4: Simplify right side
    389,926.20x = 123,944,602,702.14
  5. Step 5: Solve for x
    x = 123,944,602,702.14/389,926.20
  6. Step 6: Final answer
    x = 317,866.82

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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.