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Finding the Fourth Proportional to 208,420.80, 291,439.20 and 208,420.80

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Solution

The fourth proportional to 208,420.80, 291,439.20 and 208,420.80 is: 291,439.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,420.80 : 291,439.20 = 208,420.80 : x
  2. Step 2: Convert to fraction form
    208,420.80/291,439.20 = 208,420.80/x
  3. Step 3: Cross multiply
    208,420.80x = 291,439.20 × 208,420.80
  4. Step 4: Simplify right side
    208,420.80x = 60,741,991,215.36
  5. Step 5: Solve for x
    x = 60,741,991,215.36/208,420.80
  6. Step 6: Final answer
    x = 291,439.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.