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Finding the Fourth Proportional to 347,685.20, 520,750.20 and 285,477.20

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Solution

The fourth proportional to 347,685.20, 520,750.20 and 285,477.20 is: 427,577.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,685.20 : 520,750.20 = 285,477.20 : x
  2. Step 2: Convert to fraction form
    347,685.20/520,750.20 = 285,477.20/x
  3. Step 3: Cross multiply
    347,685.20x = 520,750.20 × 285,477.20
  4. Step 4: Simplify right side
    347,685.20x = 148,662,308,995.44
  5. Step 5: Solve for x
    x = 148,662,308,995.44/347,685.20
  6. Step 6: Final answer
    x = 427,577.33

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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.