Home / 390,038.20-584,619.90-200,425.30

Finding the Fourth Proportional to 390,038.20, 584,619.90 and 200,425.30

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Solution

The fourth proportional to 390,038.20, 584,619.90 and 200,425.30 is: 300,413.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,038.20 : 584,619.90 = 200,425.30 : x
  2. Step 2: Convert to fraction form
    390,038.20/584,619.90 = 200,425.30/x
  3. Step 3: Cross multiply
    390,038.20x = 584,619.90 × 200,425.30
  4. Step 4: Simplify right side
    390,038.20x = 117,172,618,843.47
  5. Step 5: Solve for x
    x = 117,172,618,843.47/390,038.20
  6. Step 6: Final answer
    x = 300,413.19

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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.