Home / 389,621.70-584,432.55-309,905.55

Finding the Fourth Proportional to 389,621.70, 584,432.55 and 309,905.55

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Solution

The fourth proportional to 389,621.70, 584,432.55 and 309,905.55 is: 464,858.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,621.70 : 584,432.55 = 309,905.55 : x
  2. Step 2: Convert to fraction form
    389,621.70/584,432.55 = 309,905.55/x
  3. Step 3: Cross multiply
    389,621.70x = 584,432.55 × 309,905.55
  4. Step 4: Simplify right side
    389,621.70x = 181,118,890,845.65
  5. Step 5: Solve for x
    x = 181,118,890,845.65/389,621.70
  6. Step 6: Final answer
    x = 464,858.33

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1.5x scale

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.