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Finding the Fourth Proportional to 373,390.80, 559,405.80 and 215,149.20

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Solution

The fourth proportional to 373,390.80, 559,405.80 and 215,149.20 is: 322,331.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    373,390.80 : 559,405.80 = 215,149.20 : x
  2. Step 2: Convert to fraction form
    373,390.80/559,405.80 = 215,149.20/x
  3. Step 3: Cross multiply
    373,390.80x = 559,405.80 × 215,149.20
  4. Step 4: Simplify right side
    373,390.80x = 120,355,710,345.36
  5. Step 5: Solve for x
    x = 120,355,710,345.36/373,390.80
  6. Step 6: Final answer
    x = 322,331.75

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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.