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Finding the Fourth Proportional to 389,620.80, 584,431.20 and 346,318.20

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Solution

The fourth proportional to 389,620.80, 584,431.20 and 346,318.20 is: 519,477.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,620.80 : 584,431.20 = 346,318.20 : x
  2. Step 2: Convert to fraction form
    389,620.80/584,431.20 = 346,318.20/x
  3. Step 3: Cross multiply
    389,620.80x = 584,431.20 × 346,318.20
  4. Step 4: Simplify right side
    389,620.80x = 202,399,161,207.84
  5. Step 5: Solve for x
    x = 202,399,161,207.84/389,620.80
  6. Step 6: Final answer
    x = 519,477.30

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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.